feat: add plugin button and navigation slots for enhanced plugin integration across various components

src/app/features/room/message/Message.tsx

@@ -75,6 +75,7 @@ import { stopPropagation } from '../../../utils/keyboard';
 import { getMatrixToRoomEvent } from '../../../plugins/matrix-to';
 import { getViaServers } from '../../../plugins/via-servers';
 import { useMediaAuthentication } from '../../../hooks/useMediaAuthentication';
+import { PluginButtonSlot } from '../../../features/settings/plugins/PluginButtonSlot';
 import { useRoomPinnedEvents } from '../../../hooks/useRoomPinnedEvents';
 import { MemberPowerTag, StateEvent } from '../../../../types/matrix/room';
 import { PowerIcon } from '../../../components/power';
@@ -1070,6 +1071,7 @@ export const Message = as<'div', MessageProps>(
                     <Icon src={Icons.Delete} size="100" />
                   </IconButton>
                 )}
+                <PluginButtonSlot location="message-actions" />
                 <PopOut
                   anchor={menuAnchor}
                   position="Bottom"
@@ -1333,6 +1335,7 @@ export const Event = as<'div', EventProps>(
           <div className={css.MessageOptionsBase}>
             <Menu className={css.MessageOptionsBar} variant="SurfaceVariant">
               <Box gap="100">
+                <PluginButtonSlot location="message-actions" />
                 <PopOut
                   anchor={menuAnchor}
                   position="Bottom"