docs(docs): add wrapper badge component, make backlinks collapsible, and include solution code for Gas Station problem

apps/docs/content/(05-decision-space)/greedy/134-gas-station.mdx

@@ -32,4 +32,16 @@ sidebar:
 ```py
 class Solution:
     def canCompleteCircuit(self, gas: list[int], cost: list[int]) -> int:
+        start, tank, total = 0, 0, 0
+
+        for i in range(len(gas)):
+            drive = gas[i] - cost[i]
+            tank = tank + drive
+
+            if tank < 0:
+                tank = 0
+                start = i + 1
+            total = total + drive
+
+        return start if total >= 0 else -1
 ```