docs(guides): add icons and sidebar badges to guide pages

apps/docs/content/guides/(1-data-structures)/array.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Array"
 list: "https://leetcode.com/problem-list/array/"
+icon: list-ordered
+sidebar:
+  badge: '38'
 ---
 
 :::note

apps/docs/content/guides/(1-data-structures)/binary-tree.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Binary Tree"
 list: "https://leetcode.com/problem-list/binary-tree/"
+icon: git-branch
+sidebar:
+  badge: '9'
 ---
 
 :::note

apps/docs/content/guides/(1-data-structures)/directed-acyclic-graph.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Directed Acyclic Graph"
 list: "https://leetcode.com/problem-list/directed-acyclic-graph/"
+icon: route
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(1-data-structures)/doubly-linked-list.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Doubly-Linked List"
 list: "https://leetcode.com/problem-list/doubly-linked-list/"
+icon: link-2
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(1-data-structures)/graph.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Graph Theory"
 list: "https://leetcode.com/problem-list/graph/"
+icon: share-2
+sidebar:
+  badge: '5'
 ---
 
 :::note

apps/docs/content/guides/(1-data-structures)/k-d-tree.mdx

@@ -1,6 +1,9 @@
 ---
 title: "K-D Tree"
 list: "https://leetcode.com/problem-list/k-d-tree/"
+icon: axis-3d
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(1-data-structures)/queue.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Queue"
 list: "https://leetcode.com/problem-list/queue/"
+icon: list-end
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(1-data-structures)/string.mdx

@@ -1,6 +1,9 @@
 ---
 title: "String"
 list: "https://leetcode.com/problem-list/string/"
+icon: quote
+sidebar:
+  badge: '16'
 ---
 
 :::note

apps/docs/content/guides/(1-data-structures)/tree.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Tree"
 list: "https://leetcode.com/problem-list/tree/"
+icon: tree-deciduous
+sidebar:
+  badge: '9'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/bidirectional-search.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Bidirectional Search"
 list: "https://leetcode.com/problem-list/bidirectional-search/"
+icon: move-horizontal
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/binary-lifting.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Binary Lifting"
 list: "https://leetcode.com/problem-list/binary-lifting/"
+icon: chevrons-up
+sidebar:
+  badge: '2'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/bit-manipulation.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Bit Manipulation"
 list: "https://leetcode.com/problem-list/bit-manipulation/"
+icon: binary
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/bracket-sequences.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Bracket Sequences"
 list: "https://leetcode.com/problem-list/bracket-sequences/"
+icon: parentheses
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/bucket-sort.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Bucket Sort"
 list: "https://leetcode.com/problem-list/bucket-sort/"
+icon: container
+sidebar:
+  badge: '2'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/complete-knapsack.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Complete Knapsack"
 list: "https://leetcode.com/problem-list/complete-knapsack/"
+icon: package-plus
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/divide-and-conquer.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Divide and Conquer"
 list: "https://leetcode.com/problem-list/divide-and-conquer/"
+icon: split
+sidebar:
+  badge: '5'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/floyds-cycle-finding-algorithm.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Floyd's Cycle Finding Algorithm"
 list: "https://leetcode.com/problem-list/floyds-cycle-finding-algorithm/"
+icon: repeat
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/knapsack-problem.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Knapsack Problem"
 list: "https://leetcode.com/problem-list/knapsack-problem/"
+icon: backpack
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/longest-common-subsequence.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Longest Common Subsequence"
 list: "https://leetcode.com/problem-list/longest-common-subsequence/"
+icon: diff
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/lowest-common-ancestor.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Lowest Common Ancestor"
 list: "https://leetcode.com/problem-list/lowest-common-ancestor/"
+icon: git-merge
+sidebar:
+  badge: '2'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/memoization.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Memoization"
 list: "https://leetcode.com/problem-list/memoization/"
+icon: database
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/merge-sort.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Merge Sort"
 list: "https://leetcode.com/problem-list/merge-sort/"
+icon: blend
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/quickselect.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Quickselect"
 list: "https://leetcode.com/problem-list/quickselect/"
+icon: crosshair
+sidebar:
+  badge: '3'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/recursion.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Recursion"
 list: "https://leetcode.com/problem-list/recursion/"
+icon: iteration-ccw
+sidebar:
+  badge: '3'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/simulation.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Simulation"
 list: "https://leetcode.com/problem-list/simulation/"
+icon: monitor-play
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/sorting.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Sorting"
 list: "https://leetcode.com/problem-list/sorting/"
+icon: arrow-down-wide-narrow
+sidebar:
+  badge: '10'
 ---
 
 :::note

apps/docs/content/guides/(2-algorithms)/tournament-sort.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Tournament Sort"
 list: "https://leetcode.com/problem-list/tournament-sort/"
+icon: trophy
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(3-techniques)/combinatorics.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Combinatorics"
 list: "https://leetcode.com/problem-list/combinatorics/"
+icon: dices
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(3-techniques)/counting.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Counting"
 list: "https://leetcode.com/problem-list/counting/"
+icon: tally-5
+sidebar:
+  badge: '3'
 ---
 
 :::note

apps/docs/content/guides/(3-techniques)/design.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Design"
 list: "https://leetcode.com/problem-list/design/"
+icon: pencil-ruler
+sidebar:
+  badge: '5'
 ---
 
 :::note

apps/docs/content/guides/(3-techniques)/geometry.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Geometry"
 list: "https://leetcode.com/problem-list/geometry/"
+icon: shapes
+sidebar:
+  badge: '1'
 ---
 
 :::note

apps/docs/content/guides/(3-techniques)/math.mdx

@@ -1,6 +1,9 @@
 ---
 title: "Math"
 list: "https://leetcode.com/problem-list/math/"
+icon: calculator
+sidebar:
+  badge: '6'
 ---
 
 :::note