feat: add custom css for board and custom classes in advanced options for items (#512)

* feat: add custom css for board and custom classes in advanced options for items

* chore: add mysql migration

* fix: test not working

* fix: format issues

* fix: typecheck issue

* fix: build issue

* chore: add missing translations

* fix: merge issues related to migrations

* fix: format issues

* fix: merge issue with migration

* fix: format issue

apps/nextjs/src/app/[locale]/boards/_layout-creator.tsx

@@ -12,6 +12,7 @@ import { ClientShell } from "~/components/layout/shell";
 import type { Board } from "./_types";
 import { BoardProvider } from "./(content)/_context";
 import type { Params } from "./(content)/_creator";
+import { CustomCss } from "./(content)/_custom-css";
 import { BoardMantineProvider } from "./(content)/_theme";
 
 interface CreateBoardLayoutProps<TParams extends Params> {
@@ -44,6 +45,7 @@ export const createBoardLayout = <TParams extends Params>({
       <GlobalItemServerDataRunner board={initialBoard} shouldRun={isBoardContentPage}>
         <BoardProvider initialBoard={initialBoard}>
           <BoardMantineProvider>
+            <CustomCss />
             <ClientShell hasNavigation={false}>
               <MainHeader
                 logo={<BoardLogoWithTitle size="md" hideTitleOnMobile />}