Added typescript to etherpad

* Fixed determining file extension.

* Added ts-node

* Fixed backend tests.

* Fixed frontend test runs.

* Fixed tests.

* Use script approach for starting etherpad.

* Change directory to src.

* Fixed env.

* Change directory

* Fixed build arg.

* Fixed docker build.

* Fixed.

* Fixed cypress file path.

* Fixed.

* Use latest node container.

* Fixed windows workflow.

* Use tsx and optimized docker image.

* Added workflow for type checks.

* Fixed.

* Added tsconfig.

* Converted more files to typescript.

* Removed commented keys.

* Typed caching middleware.

* Added script for checking the types.

* Moved SecretRotator to typescript.

* Fixed npm installation and moved to types folder.

* Use better scripts for watching typescript changes.

* Update windows.yml

* Fixed order of npm installation.

* Converted i18n.

* Added more types.

* Added more types.

* Fixed import.

* Fixed tests.

* Fixed tests.

* Fixed type checking test.

* Fixed stats

* Added express types.

* fixed.

.github/workflows/upgrade-from-latest-release.yml

@@ -87,13 +87,16 @@ jobs:
         run: src/bin/installDeps.sh
       -
         name: Run the backend tests
-        run: cd src && npm test
+        working-directory: ./src
+        run: npm test
       -
         name: Install Cypress
-        run: cd src && npm install cypress --legacy-peer-deps
+        working-directory: ./src
+        run: npm install cypress --legacy-peer-deps
       -
         name: Run Etherpad & Test Frontend
+        working-directory: ./src
         run: |
-          node src/node/server.js &
+          npm run dev &
           curl --connect-timeout 10 --max-time 20 --retry 5 --retry-delay 10 --retry-max-time 60 --retry-connrefused http://127.0.0.1:9001/p/test
-          ./src/node_modules/cypress/bin/cypress run --config-file src/tests/frontend/cypress/cypress.config.js
+          ./node_modules/cypress/bin/cypress run --config-file tests/frontend/cypress/cypress.config.js