feat: enable the use of TypeScript in this repo (#604)

* feat: enable Typescript in this repo

* refactor: rename studio-header files to .ts[x]

* chore: fix minor type warnings

* chore: add types for frontend-platform

* chore: fix type issues

* chore: update name of suppressed lint check

.github/workflows/ci.yml

@@ -24,6 +24,8 @@ jobs:
       run: make validate-no-uncommitted-package-lock-changes
     - name: Lint
       run: npm run lint
+    - name: Type check
+      run: npm run types
     - name: Test
       run: npm run test
     - name: Build

.github/workflows/release.yml

@@ -25,6 +25,8 @@ jobs:
       run: make validate-no-uncommitted-package-lock-changes
     - name: Lint
       run: npm run lint
+    - name: Type check
+      run: npm run types
     - name: Test
       run: npm run test
     - name: i18n_extract