feat: implement Obsidian MCP Bundle MVP (Phase 1-3)

- Complete project setup with TypeScript, Jest, MCPB manifest
- Implement foundational infrastructure (CLI executor, logger, error handler)
- Add 9 file operation tools for User Story 1
- Full MCP protocol compliance with stdio transport
- Input validation and sanitization for security
- Comprehensive error handling with actionable messages
- Constitutional compliance: all 6 principles satisfied

MVP includes:
- obsidian_create_note, read, append, prepend, delete, move, rename, open, file_info
- Zod validation schemas for all parameters
- 30s timeout configuration with per-command overrides
- Stderr-only logging with sanitized output
- Graceful shutdown handling

Build: ✅ 0 errors, 0 vulnerabilities
Tasks: 48/167 complete (MVP milestone)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/agents/copilot-instructions.md

@@ -0,0 +1,29 @@
+# obsidian-mcp Development Guidelines
+
+Auto-generated from all feature plans. Last updated: 2026-03-22
+
+## Active Technologies
+
+- Node.js >=18.0.0 (TypeScript 5.x) + @modelcontextprotocol/sdk, child_process (Node.js built-in) (001-obsidian-mcp-bundle)
+
+## Project Structure
+
+```text
+src/
+tests/
+```
+
+## Commands
+
+npm test && npm run lint
+
+## Code Style
+
+Node.js >=18.0.0 (TypeScript 5.x): Follow standard conventions
+
+## Recent Changes
+
+- 001-obsidian-mcp-bundle: Added Node.js >=18.0.0 (TypeScript 5.x) + @modelcontextprotocol/sdk, child_process (Node.js built-in)
+
+<!-- MANUAL ADDITIONS START -->
+<!-- MANUAL ADDITIONS END -->