Debtmap Re-adds JavaScript and TypeScript Support

Debtmap v0.15.0 adds JavaScript and TypeScript support using tree-sitter. Some history: debtmap originally supported multiple languages, but I removed JS/TS in v0.7.0 to focus on Rust. The multi-language implementation was half-baked and the maintenance burden wasn&rsquo;t worth it. After getting the Rust analyzer right (entropy dampening, purity analysis, call graph integration), I rebuilt JS/TS…