new template format for readme

Author: danoshi

src/template.md

@@ -0,0 +1,35 @@
+# Problem Name
+
+## Problem Description
+
+[LeetCode Link](problem_url)
+
+Brief description of the problem.
+
+## Approach
+
+1. Step-by-step explanation
+2. Key insights
+3. Algorithm breakdown
+
+## Complexity Analysis
+
+- Time Complexity: `O(n)`
+- Space Complexity: `O(1)`
+
+## Code Implementation
+
+```python
+def solution():
+    # Implementation
+```
+
+## Test Cases
+
+```python
+# Example test cases
+```
+
+## Notes
+
+Additional insights, alternative approaches, or learning points.