Add initial typescript config and use it for eslint,vitest,playwright (#31186)

This enables eslint to use the typescript parser and resolver which
brings some benefits that eslint rules now have type information
available and a tsconfig.json is required for the upcoming typescript
migration as well. Notable changes done:

- Add typescript parser and resolver
- Move the vue-specific config into the root file
- Enable `vue-scoped-css/enforce-style-type` rule, there was only one
violation and I added a inline disable there.
- Fix new lint errors that were detected because of the parser change
- Update `i/no-unresolved` to remove now-unnecessary workaround for the
resolver
- Disable `i/no-named-as-default` as it seems to raise bogus issues in
the webpack config
- Change vitest config to typescript
- Change playwright config to typescript
- Add `eslint-plugin-playwright` and fix issues
- Add `tsc` linting to `make lint-js`

web_src/js/features/repo-code.js

@@ -153,7 +153,7 @@ export function initRepoCodeView() {
     });
 
     $(window).on('hashchange', () => {
-      let m = window.location.hash.match(rangeAnchorRegex);
+      let m = rangeAnchorRegex.exec(window.location.hash.match);
       const $linesEls = $(getLineEls());
       let $first;
       if (m) {
@@ -170,7 +170,7 @@ export function initRepoCodeView() {
           return;
         }
       }
-      m = window.location.hash.match(singleAnchorRegex);
+      m = singleAnchorRegex.exec(window.location.hash.match);
       if (m) {
         $first = $linesEls.filter(`[rel=L${m[2]}]`);
         if ($first.length) {