feat(wave3): add @mosaic/cli — unified mosaic CLI entry point

- Root Commander program with version + description
- Subcommand groups: coord, prdy, queue, quality-rails
- Single `mosaic` binary entry point
- Depends on all @mosaic/* workspace packages

packages/cli/eslint.config.js

@@ -0,0 +1,15 @@
+import tsParser from '@typescript-eslint/parser';
+
+export default [
+  {
+    files: ['src/**/*.ts', 'bin/**/*.ts', 'tests/**/*.ts'],
+    languageOptions: {
+      parser: tsParser,
+      parserOptions: {
+        ecmaVersion: 'latest',
+        sourceType: 'module',
+      },
+    },
+    rules: {},
+  },
+];