feat: BIG changes

* use commands constants
* use a separate goroutine to read from connection
* refactor connection reading and ui updating
* add sidepanel for users in channel
* other cleanups

ui/app/cmds.go

@@ -19,10 +19,10 @@ package app
 import tea "github.com/charmbracelet/bubbletea"
 
 func (s *State) Quit() tea.Msg {
-	if s.Client.TlsConn != nil {
-		s.Client.SendCommand("QUIT")
-		s.Client.TlsConn.Close()
+	if s.Client.Quit != nil {
+		close(s.Client.Quit)
 	}
+
 	if s.Client.TcpConn != nil {
 		s.Client.SendCommand("QUIT")
 		s.Client.TcpConn.Close()