chore: 開発モードでフロントエンドとバックエンドを独立して起動するようにする（再） (#12593)

* [wip]run standalone vite

* [wip]run standalone vite

* some fix (tabler icons, sw, streaming)

* fix theme

* fix run scripts

* favicon

* client-assets

* cssの読み込み順序とCSP設定の変更

* fix lang change

* fix clientManifest

* baseを相対パスにしてドメイン直下とサブディレクトリ配下両方に対応

* 色々修正

* 色々修正

* 色々修正

* fix

* Revert "client-assets"

This reverts commit 582601e90eb771875bdf8aba263da2316a59d01b.

# Conflicts:
#	packages/frontend/vite.config.ts

* 色々修正

* fix

* fix

* add url and proxy to server proxy

* Update packages/frontend/src/index.html

* wip

* Merge remote-tracking branch 'origin/develop' into feat/launch-standalone-frontend

# Conflicts:
#	packages/frontend/src/pages/welcome.entrance.a.vue

* Merge remote-tracking branch 'origin/develop' into feat/launch-standalone-frontend

# Conflicts:
#	packages/frontend/src/pages/welcome.entrance.a.vue

* fix tabler load

* Apply suggestions from code review

* Update packages/frontend/src/index.html

* fix

* fix vite.config.local-dev.ts

* fix CONTRIBUTING.md

---------

Co-authored-by: FruitRiin <nassii74@gmail.com>
Co-authored-by: osamu <46447427+sam-osamu@users.noreply.github.com>
Co-authored-by: 果物リン <fruitriin@riinswork.space>
Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
Co-authored-by: ozelot <contact@ozelot.dev>

CONTRIBUTING.md

@@ -138,6 +138,11 @@ After finishing the migration, run the `pnpm dev` command to start the developme
 pnpm dev
 ```
 
+To access Misskey once it's launched, type `http://localhost:[port]` in your browser's address bar.  
+The [port] part will contain the value set in the port item of .config/default.yml (3000 will be entered by default)
+
+caution: If you use a port other than 3000, you need to change the proxy settings in packages/frontend/vite.config.local-dev.ts.
+
 ## Testing
 - Test codes are located in [`/packages/backend/test`](/packages/backend/test).