feat: implement command mode

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/hyperlog-tui/src/models.rs

@@ -1,3 +1,5 @@
+use crate::commands::{Command, IntoCommand};
+
 #[derive(Debug)]
 pub enum Msg {
     MoveRight,
@@ -7,10 +9,20 @@ pub enum Msg {
     OpenCreateItemDialog,
 
     EnterInsertMode,
+    EnterViewMode,
     EnterCommandMode,
+
+    SubmitCommand,
+
     Edit(EditMsg),
 }
 
+impl IntoCommand for Msg {
+    fn into_command(self) -> crate::commands::Command {
+        Command::new(|| Some(self))
+    }
+}
+
 #[derive(Debug)]
 pub enum EditMsg {
     Delete,