fix: make plugin installable from git via source entry and prepack

OpenClaw's git plugin install clones the repo, runs npm install --omit=dev,
and validates the extension entry exists. Pointing the entry at ./index.ts
matches the official provider plugins (chutes/opencode) and lets the host
load the TS source when no built dist artifact is present; prepack keeps
the published npm tarball carrying the built dist.

Author: TheStreamCode

package.json

@@ -15,7 +15,8 @@
     "build": "tsc -p tsconfig.json",
     "typecheck": "tsc -p tsconfig.json --noEmit",
     "test": "vitest run",
-    "clean": "rimraf dist"
+    "clean": "rimraf dist",
+    "prepack": "npm run build"
   },
   "keywords": [
     "openclaw",
@@ -25,9 +26,14 @@
     "llm",
     "provider"
   ],
+  "files": [
+    "dist",
+    "openclaw.plugin.json",
+    "README.md"
+  ],
   "openclaw": {
     "extensions": [
-      "./dist/index.js"
+      "./index.ts"
     ],
     "providers": [
       "commandcode"