[FEATURE] Add semantic code editor tool with tree-sitter parsing

[WencySuo]

Problem Statement

Many users working on code automation and refactoring scenarios rely on semantic code understanding to manage complex edits safely. Without a semantic code editor tool, strands agents cannot:

1. parse code structure semantically
2. perform safe refactoring operations that preserve syntax
3. validate edits with integrated linting before applying changes
4. generate precise diffs that target specific code constructs

Proposed Solution

Introduce code_editor tool in strands.tools package, powered by tree-sitter and integrated linters

Use Case

This will really help improve code refactoring workflow accuracy and reliability by preventing syntax breakage.

Alternatives Solutions

Using existing editor tool with manual validation, less safe and requires post-edit error checking

Additional Context

I'm happy to contribute to this implementation

[WencySuo]

I'm working on implementing this feature.