✨(frontend) add admin side panel for room management

Introduce new dedicated side panel for room administration, providing
centralized interface for admins to manage room settings and participants.
Content will be added in the upcoming commits.

src/frontend/src/features/rooms/livekit/components/SidePanel.tsx

@@ -11,6 +11,7 @@ import { ReactNode } from 'react'
 import { Chat } from '../prefabs/Chat'
 import { Transcript } from './Transcript'
 import { Effects } from './effects/Effects'
+import { Admin } from './Admin'
 
 type StyledSidePanelProps = {
   title: string
@@ -108,6 +109,7 @@ export const SidePanel = () => {
     isChatOpen,
     isSidePanelOpen,
     isTranscriptOpen,
+    isAdminOpen,
   } = useSidePanel()
   const { t } = useTranslation('rooms', { keyPrefix: 'sidePanel' })
 
@@ -132,6 +134,9 @@ export const SidePanel = () => {
       <Panel isOpen={isTranscriptOpen}>
         <Transcript />
       </Panel>
+      <Panel isOpen={isAdminOpen}>
+        <Admin />
+      </Panel>
     </StyledSidePanel>
   )
 }