feat(ui): add bottom and bottomOpacity to ChannelHeader#2318

xsahil03x merged 6 commits intoGetStream:masterGetStream/stream-chat-flutter:masterfrom

Tango-Tango:feat/add-bottom-to-channel-list-headerTango-Tango/stream-chat-flutter:feat/add-bottom-to-channel-list-headerCopy head branch name to clipboard