docs(docs): add binary search images and new problem redirects

apps/docs/redirects.ts

@@ -10,8 +10,10 @@ export default [
   { from: "/21", to: "/linked-list/merge-two-sorted-lists" },
   { from: "/23", to: "/heap-priority-queue/merge-k-sorted-lists" },
   { from: "/33", to: "/binary-search/search-in-rotated-sorted-array" },
+  { from: "/34", to: "/binary-search/find-first-and-last-position-of-element-in-sorted-array" },
   { from: "/35", to: "/binary-search/search-insert-position" },
   { from: "/39", to: "/backtracking/combination-sum" },
+  { from: "/42", to: "/two-pointers/trapping-rain-water" },
   { from: "/46", to: "/backtracking/permutations" },
   { from: "/48", to: "/matrix-index-math/rotate-image" },
   { from: "/49", to: "/hash-table/group-anagrams" },
@@ -47,6 +49,7 @@ export default [
   { from: "/206", to: "/linked-list/reverse-linked-list" },
   { from: "/207", to: "/topological-sort/course-schedule" },
   { from: "/208", to: "/trie/implement-trie-prefix-tree" },
+  { from: "/209", to: "/sliding-window/minimum-size-subarray-sum" },
   { from: "/210", to: "/topological-sort/course-schedule-ii" },
   { from: "/211", to: "/trie/design-add-and-search-words-data-structure" },
   { from: "/215", to: "/heap-priority-queue/kth-largest-element-in-an-array" },