Implement Phase 1: Foundation

- Set up TypeScript project with strict mode
- Configure tsup build system (ESM output)
- Configure vitest for testing (36 tests passing)
- Configure ESLint with flat config for TypeScript
- Implement Commander.js CLI with all 4 commands:
  - init: Configure API keys with validation
  - new: Create new Ralph Method project (stub)
  - validate: Validate PROMPT.md files
  - research: Research topics via Perplexity (stub)
- Implement config management:
  - Keys stored in ~/.ralph-generator/config.json
  - File permissions set to 600
  - Environment variables override file config
- Implement logging utility with verbosity levels
- Implement atomic file writes utility

All Phase 1 acceptance criteria met.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

eslint.config.js

@@ -0,0 +1,15 @@
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  {
+    ignores: ['dist/**', 'node_modules/**', '*.config.js'],
+  },
+  {
+    rules: {
+      '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+    },
+  }
+);