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>

tests/fixtures/sample-note.md

@@ -0,0 +1,17 @@
+# Sample Note 1
+
+This is a test note for the MCP bundle.
+
+## Tasks
+
+- [ ] Sample task 1
+- [x] Completed task
+
+## Tags
+
+#test #sample
+
+## Properties
+
+property:: value
+created:: 2026-03-22