feat: Add 6 new languages to codebase analysis system (C#, Go, Rust, Java, Ruby, PHP)
Expands language support from 3 to 9 languages across entire codebase scraping system.
**New Languages Added:**
- C# (Unity/.NET support) - classes, methods, properties, async/await, XML docs
- Go - structs, functions, methods with receivers, multiple return values
- Rust - structs, functions, async functions, impl blocks
- Java - classes, methods, inheritance, interfaces, generics
- Ruby - classes, methods, inheritance, predicate methods
- PHP - classes, methods, namespaces, inheritance
**Code Analysis (code_analyzer.py):**
- Added 6 new language analyzers (~1000 lines)
- Regex-based parsers inspired by official language specs
- Extract classes, functions, signatures, async detection
- Comprehensive comment extraction for all languages
**Dependency Analysis (dependency_analyzer.py):**
- Added 6 new import extractors (~300 lines)
- C#: using statements, static using, aliases
- Go: import blocks, aliases
- Rust: use statements, curly braces, crate/super
- Java: import statements, static imports, wildcards
- Ruby: require, require_relative, load
- PHP: require/include, namespace use
**File Extensions (codebase_scraper.py):**
- Added mappings: .cs, .go, .rs, .java, .rb, .php
**Test Coverage:**
- Added 24 new tests for 6 languages (4 tests each)
- Added 19 dependency analyzer tests
- Added 6 language detection tests
- Total: 118 tests, 100% passing ✅
**Credits:**
- Regex patterns based on official language specifications:
- Microsoft C# Language Specification
- Go Language Specification
- Rust Language Reference
- Oracle Java Language Specification
- Ruby Documentation
- PHP Language Reference
- NetworkX for graph algorithms
**Issues Resolved:**
- Closes #166 (C# support request)
- Closes #140 (E1.7 MCP tool scrape_codebase)
**Test Results:**
- test_code_analyzer.py: 54 tests passing
- test_dependency_analyzer.py: 43 tests passing
- test_codebase_scraper.py: 21 tests passing
- Total execution: ~0.41s
🚀 Generated with Claude Code
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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