feat: npx/git-install support — prepare script + files whitelist

prepare builds dist on git-clone installs (npx/npm i -g from the gitea
URL); files whitelist overrides .gitignore so dist ships in the pack.

package.json

@@ -15,12 +15,18 @@
     "inkreach-teable": "./dist/bin.js"
   },
   "main": "dist/bin.js",
+  "files": [
+    "dist",
+    "skills",
+    "docs"
+  ],
   "scripts": {
     "build": "tsc -p tsconfig.build.json",
     "dev": "tsc -p tsconfig.build.json --watch",
     "typecheck": "tsc -p tsconfig.json --noEmit",
     "test": "vitest run",
-    "clean": "rimraf dist tsconfig.build.tsbuildinfo"
+    "clean": "rimraf dist tsconfig.build.tsbuildinfo",
+    "prepare": "npm run build"
   },
   "dependencies": {
     "commander": "^12.1.0"