feat(mosaic): migrate install wizard from v0 to v1

Complete port of the ~2000 LOC mosaic install wizard from v0. Migrates
all 27 source files across the prompter, config, platform, template,
runtime, skills, and stages subsystems to v1 ESM/NodeNext conventions.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/mosaic/package.json

@@ -1,8 +1,13 @@
 {
   "name": "@mosaic/mosaic",
-  "version": "0.0.0",
+  "version": "0.1.0",
+  "description": "Mosaic installation wizard",
+  "type": "module",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
+  "bin": {
+    "mosaic-wizard": "dist/index.js"
+  },
   "exports": {
     ".": {
       "types": "./dist/index.d.ts",
@@ -15,7 +20,15 @@
     "typecheck": "tsc --noEmit",
     "test": "vitest run --passWithNoTests"
   },
+  "dependencies": {
+    "@clack/prompts": "^0.9.1",
+    "commander": "^12.1.0",
+    "picocolors": "^1.1.1",
+    "yaml": "^2.6.1",
+    "zod": "^3.23.8"
+  },
   "devDependencies": {
+    "@types/node": "^22.0.0",
     "typescript": "^5.8.0",
     "vitest": "^2.0.0"
   }