chore: migrate from npm to yarn package manager

- Replace npm with yarn in CI/CD publish workflow
- Update dependency installation to use yarn with immutable lockfile
- Remove package-lock.json and add yarn.lock
- Update build command to use yarn instead of npm
- Add custom HTTP headers module with trusted provider validation
- Improve type definitions and utility exports
- Streamline dependency management for better reproducibility

Author: alexcmgit

.github/workflows/publish.yml

@@ -52,13 +52,13 @@ jobs:
           scope: \@${{ github.repository_owner }}
 
       - name: Update npm
-        run: npm install -g npm@latest
+        run: npm install --global yarn
 
       - name: Install dependencies
-        run: npm ci
+        run: yarn install --immutable --immutable-cache --check-cache
 
       - name: Build package
-        run: npm run build
+        run: yarn build
 
       - name: Publish package
         run: npm publish --access public