Add codesize - file and function size linter with tree-sitter

[ChrisGVE]

Summary

• Adds codesize, a MIT-licensed CLI tool that reports files and functions exceeding per-language size limits
• Uses tree-sitter for accurate function boundary detection (not line-counting heuristics)
• Supports Rust, TypeScript, JavaScript, Python, Go, Java, C, C++, Swift, and Lua out of the box; additional languages are configurable via TOML
• Outputs CSV for easy CI integration

Tool details

• License: MIT
• Type: CLI
• Source: https://github.com/ChrisGVE/codesize
• Languages: C, C++, Go, Java, JavaScript, Lua, Python, Rust, Swift, TypeScript