various bundle optimizations (#1549)

* fix: missing "@element-plus/icons-vue" dependency

* fix: update vite (40% faster builds)

* fix: don't include sentry in non-nightly builds

* fix: swap to variable fonts & don't include font files in repo

* fix: lazy load languages to not keep them in memory

* nit: revert vite to stable

* nit: retain `.json` message files in bundle

* nit: remove bundle analyzer

* fix: availableLocales does not include unloaded locales

src/localization/locales.js

@@ -0,0 +1,17 @@
+// Separate file, to be importable in `vite.config.js`.
+export const languageCodes = [
+    'cs',
+    'en',
+    'es',
+    'fr',
+    'hu',
+    'ja',
+    'ko',
+    'pl',
+    'pt',
+    'ru',
+    'th',
+    'vi',
+    'zh-CN',
+    'zh-TW'
+];