refactor: remove TypeScript declaration file and clean up tsconfig

- Removed src/lwrjs-api.d.ts declaration file
- Cleaned up tsconfig.json to remove .d.ts includes
- Cleaned up test/tsconfig.json to remove .nut.ts includes
- Testing if dependency fixes alone resolve @lwrjs/api issue without TypeScript declarations

Author: lesya7

src/lwrjs-api.d.ts

@@ -1,6 +1,6 @@
 {
   "extends": "@salesforce/dev-config/tsconfig-test-strict-esm",
-  "include": ["./**/*.ts", "./**/*.nut.ts"],
+  "include": ["./**/*.ts"],
   "compilerOptions": {
     "skipLibCheck": true
   }

test/tsconfig.json

@@ -6,5 +6,5 @@
     "skipLibCheck": true,
     "baseUrl": "."
   },
-  "include": ["./src/**/*.ts", "./src/**/*.d.ts"]
+  "include": ["./src/**/*.ts"]
 }