chore: initialize monorepo scaffold with npm workspaces

packages/cli/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "@visionl/cli",
+  "version": "0.1.0",
+  "private": true,
+  "bin": {
+    "visionl": "./dist/index.js"
+  },
+  "scripts": {
+    "typecheck": "tsc -b",
+    "build": "tsc -b"
+  },
+  "dependencies": {
+    "@visionl/core": "*",
+    "commander": "^13.0.0"
+  },
+  "devDependencies": {
+    "@types/commander": "npm:commander@^13.0.0"
+  }
+}

packages/cli/src/index.ts

@@ -0,0 +1,2 @@
+// @visionl/cli — placeholder, to be implemented in Task 4
+export const CLI_VERSION = '0.1.0';

packages/cli/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./dist",
+    "rootDir": "./src"
+  },
+  "include": ["src"],
+  "references": [{ "path": "../core" }]
+}