feat(HAI-108): remove binary builds and configure npm publishing

- Remove binary build steps from CI and delete release/test-release workflows
- Replace release workflow with npm publish via version.yml and changesets
- Configure all packages (cli, core, dashboard, engine) for npm publishing
- Add package-config tests to verify publishConfig and package metadata
- Update README and documentation to reflect npm-based distribution

packages/core/package.json

@@ -3,8 +3,18 @@
   "version": "0.1.0",
   "type": "module",
   "exports": {
-    ".": "./src/index.ts"
+    ".": {
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    }
   },
+  "publishConfig": {
+    "access": "public"
+  },
+  "files": [
+    "dist",
+    "README.md"
+  ],
   "scripts": {
     "build": "tsc",
     "typecheck": "tsc --noEmit",