chore: initialize project with package.json and tsconfig.json

- Added package.json for project dependencies and scripts
- Included tsconfig.json for TypeScript configuration

tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "extends": "astro/tsconfigs/strict",
+  "include": [".astro/types.d.ts", "**/*"],
+  "exclude": ["dist"],
+  "compilerOptions": {
+    "types": ["three"]
+  }
+}