Fix go.mod retract directive parsing and add MultiRepo tests

- Add missing `retract` directive filter in go.mod parsing
- Add 13 new tests for MultiRepo audit_dependencies covering:
  - Go go.mod directive filtering (require, replace, exclude, retract)
  - Rust Cargo.toml parsing (deps, dev-deps, build-deps, complex specs)
  - JavaScript devDependencies
  - Python requirements.txt edge cases
  - Error handling for missing files/repos
- Bump TypeScript client to 3.1.0

Add Go dependency analyzer and optimize performance (#157)

* Add Go dependency analyzer and optimize performance

Add full-featured Go dependency analyzer:
- Parse Go imports using TreeSitter
- Classify imports as internal, stdlib, or external
- Detect import cycles across packages
- Export to JSON and DOT formats
- Generate LLM context summaries

Performance optimizations (38x faster cold start):
- Add 1-second TTL cache for git SHA checks
- Fix double file tree iteration in Python analyzer
- Fix double HCL parsing in Terraform analyzer
- Replace pathlib.relative_to with string operations (5.7x faster)
- Integrate Rust-based file walker via ignore-python (47x faster)

Add comprehensive performance test harness:
- Benchmarks for Python, Go, Terraform dependency analyzers
- File tree benchmarks (Rust-accelerated)
- Symbol extraction benchmarks
- Repo map benchmarks
- CLI: python tests/perf/test_dependency_perf.py --benchmark all

* Add 3.0.0 changelog entry

Document Go dependency analyzer, 38x performance improvements,
and breaking changes (ignore-python, gitignore behavior, CLI errors).

Bump TypeScript client to 2.2.1

Bump version to 2.2.0

2.1.3

fmt and prep release

Default output for hybrid search

Prep release

2.0.1

Add new kit-dev MCP (#131)

It's a whole new world