Issue 24: Added read-only mode (#27)

- Added settings to workspace, and added the read-only mode
- Added the `-ro` field which will launch Dynamo-Browse in read-only mode
- Added the `set ro` to enable read-only mode, and `set rw` to enable read-write mode

internal/common/ui/events/errors.go

@@ -10,6 +10,11 @@ type ErrorMsg error
 // Message indicates that a message should be shown to the user
 type StatusMsg string
 
+type WrappedStatusMsg struct {
+	Message StatusMsg
+	Next    tea.Msg
+}
+
 // ModeMessage indicates that the mode should be changed to the following
 type ModeMessage string