Convert scripts/Gulpfile to checked mjs/cjs so they can run without compilation (#50988)

Author: jakebailey

.dockerignore

@@ -17,20 +17,8 @@ build.json
 *.config
 scripts/debug.bat
 scripts/run.bat
-scripts/word2md.js
-scripts/buildProtocol.js
-scripts/ior.js
-scripts/configurePrerelease.js
-scripts/open-user-pr.js
-scripts/open-cherry-pick-pr.js
-scripts/processDiagnosticMessages.d.ts
-scripts/processDiagnosticMessages.js
-scripts/produceLKG.js
-scripts/importDefinitelyTypedTests/importDefinitelyTypedTests.js
-scripts/generateLocalizedDiagnosticMessages.js
-scripts/configureLanguageServiceBuild.js
-scripts/*.js.map
-scripts/typings/
+scripts/**/*.js
+scripts/**/*.js.map
 coverage/
 internal/
 **/.DS_Store

.eslintignore

@@ -4,7 +4,8 @@
 /lib/**
 /src/lib/*.generated.d.ts
 # Ignore all compiled script outputs
-/scripts/*.js
+/scripts/**/*.js
+/scripts/**/*.d.*
 # But, not the ones that are hand-written.
 # TODO: remove once scripts are pure JS
 !/scripts/browserIntegrationTest.js