feat(go): Comprehensive Go scanner improvements and architecture enhancements (#140)

* feat(scanner): improve TypeScript scanner error handling and enable type checking

- Simplify error handling from 12 to 3 layers (file-level, safeIterate, extractImports)
- Enable type checking with lenient settings for better cross-file symbol resolution
- Add detailed error tracking with phase detection and file paths
- Remove excessive defensive coding while maintaining robustness
- Improve error logging: first 10 errors at INFO level, rest at DEBUG
- Better progress reporting with success/failure counts

This improves callee extraction accuracy while maintaining graceful error handling.

* feat(go): comprehensive Go scanner improvements and architecture enhancements

Critical reliability fixes, performance improvements, and testability enhancements for Go support:

## High Priority Fixes
- Fix silent dependency failures in copy-wasm.js script
- Add runtime WASM validation to Go scanner with early error detection
- Standardize error logging levels across scanners
- Enhance progress feedback with time estimates

## Performance & Reliability
- Add configurable concurrency via environment variables (DEV_AGENT_*_CONCURRENCY)
- Implement system resource detection with intelligent defaults
- Add batch processing for embeddings and file operations
- Prevent memory issues on resource-constrained systems

## Architecture & Testability
- Extract reusable utility modules for WASM resolution, concurrency, file validation
- Implement dependency injection for mockable file system operations
- Add comprehensive test coverage (57 new tests) for utility functions
- Centralize error handling patterns across scanners

## Documentation
- Add Configuration section to README with performance tuning
- Create LANGUAGE_SUPPORT.md with contributor guidelines
- Document new environment variables and troubleshooting steps
- Add system requirements and optimization recommendations

## New Environment Variables
- DEV_AGENT_TYPESCRIPT_CONCURRENCY: TypeScript scanner concurrency
- DEV_AGENT_INDEXER_CONCURRENCY: Embedding batch concurrency
- DEV_AGENT_GO_CONCURRENCY: Go scanner concurrency
- DEV_AGENT_CONCURRENCY: General fallback concurrency

These changes ensure robust Go support for production use while maintaining
backward compatibility and improving the overall developer experience.

* fix: update pnpm-lock.yaml for tree-sitter-wasms dependency

The lockfile was out of sync with packages/core/package.json after adding
tree-sitter-wasms dependency. This ensures CI builds work correctly with
the new Go scanner dependencies.

* chore: remove Renovate dependency automation

Remove all Renovate configuration files, workflows, and documentation:
- renovate.json5 and renovate.json (main configuration)
- .github/renovate-automerge.json5 (automerge settings)
- .github/renovate-groups.json5 (package grouping)
- .github/workflows/renovate.yml (GitHub Actions workflow)
- docs/DEPENDENCY_MANAGEMENT.md (Renovate documentation)

Dependencies will now be managed manually to give more control over updates
and reduce automated PR noise.

Author: prosdev

.github/renovate-automerge.json5

@@ -234,4 +234,13 @@ For advanced users or development, you can manually configure the MCP server:
    - Memory leak prevention (circular buffers for history/metrics)
    - Graceful shutdown (proper event listener cleanup)
    - Health monitoring (`dev_health` tool)
-   - Comprehensive logging with @lytics/kero
+   - Comprehensive logging with @lytics/kero
+
+5. **Performance Configuration**:
+   - Configurable concurrency via environment variables
+   - Auto-detection based on system resources (CPU/memory)
+   - Environment variables:
+     - `DEV_AGENT_CONCURRENCY` - global concurrency setting
+     - `DEV_AGENT_TYPESCRIPT_CONCURRENCY` - TypeScript file processing
+     - `DEV_AGENT_INDEXER_CONCURRENCY` - vector embedding batches
+   - Example: `export DEV_AGENT_CONCURRENCY=10` before running `dev index .`