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/package.json

@@ -0,0 +1,33 @@
+{
+  "name": "@mosaic/cli",
+  "version": "0.1.0",
+  "type": "module",
+  "description": "Mosaic unified CLI — the mosaic command",
+  "bin": {
+    "mosaic": "./dist/bin/mosaic.js"
+  },
+  "scripts": {
+    "build": "tsc -p tsconfig.json",
+    "typecheck": "tsc --noEmit",
+    "lint": "eslint src/",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@mosaic/types": "workspace:*",
+    "@mosaic/coord": "workspace:*",
+    "@mosaic/queue": "workspace:*",
+    "commander": "^13",
+    "picocolors": "^1.1"
+  },
+  "devDependencies": {
+    "@types/node": "^22",
+    "@typescript-eslint/parser": "^8",
+    "eslint": "^9",
+    "typescript": "^5",
+    "vitest": "^2"
+  },
+  "publishConfig": {
+    "registry": "https://git.mosaicstack.dev/api/packages/mosaic/npm",
+    "access": "public"
+  }
+}