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>

jest.config.js

@@ -0,0 +1,23 @@
+export default {
+  preset: 'ts-jest/presets/default-esm',
+  testEnvironment: 'node',
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+  transform: {
+    '^.+\\.ts$': [
+      'ts-jest',
+      {
+        useESM: true,
+      },
+    ],
+  },
+  testMatch: ['**/tests/**/*.test.ts'],
+  collectCoverageFrom: [
+    'src/**/*.ts',
+    '!src/**/*.d.ts',
+  ],
+  coverageDirectory: 'coverage',
+  coverageReporters: ['text', 'lcov', 'html'],
+};