Resolve custom plugin mts/ts config deprecation warnings (#40670)

package.json

@@ -18,7 +18,7 @@
     "fix": "yarn fix:js && yarn fix:css",
     "format": "oxfmt",
     "format:check": "oxfmt --check",
-    "i18n:extract": "formatjs extract 'app/javascript/**/*.{js,jsx,ts,tsx}' config/vite/plugin-sw-locales.ts --ignore '**/*.d.ts' --out-file app/javascript/mastodon/locales/en.json --format config/formatjs-formatter.js",
+    "i18n:extract": "formatjs extract 'app/javascript/**/*.{js,jsx,ts,tsx}' config/vite/plugin-sw-locales.mts --ignore '**/*.d.ts' --out-file app/javascript/mastodon/locales/en.json --format config/formatjs-formatter.js",
     "lint:js": "cd $INIT_CWD && eslint --cache --report-unused-disable-directives",
     "lint:css": "stylelint \"**/*.{css,scss}\"",
     "lint": "yarn lint:js && yarn lint:css",

tsconfig.json

@@ -2,6 +2,7 @@
   "compilerOptions": {
     "jsx": "react-jsx",
     "allowJs": true,
+    "allowImportingTsExtensions": true,
     "resolveJsonModule": true,
     "noEmit": true,
     "strict": true,

vite.config.mts

@@ -19,10 +19,10 @@ import {
 import manifestSRI from 'vite-plugin-manifest-sri';
 import svgr from 'vite-plugin-svgr';
 
-import { MastodonAssetsManifest } from './config/vite/plugin-assets-manifest';
-import { MastodonThemes } from './config/vite/plugin-mastodon-themes';
-import { MastodonServiceWorkerChunkPaths } from './config/vite/plugin-sw-chunk-paths';
-import { MastodonServiceWorkerLocales } from './config/vite/plugin-sw-locales';
+import { MastodonAssetsManifest } from './config/vite/plugin-assets-manifest.mts';
+import { MastodonThemes } from './config/vite/plugin-mastodon-themes.mts';
+import { MastodonServiceWorkerChunkPaths } from './config/vite/plugin-sw-chunk-paths.mts';
+import { MastodonServiceWorkerLocales } from './config/vite/plugin-sw-locales.mts';
 
 const jsRoot = path.resolve(import.meta.dirname, 'app/javascript');