Add browser-like bindings for panes and tabs

Way easier to remember.

config.kdl

@@ -144,6 +144,9 @@ keybinds clear-defaults=true {
         bind "Alt g" { SwitchToMode "Locked"; }
         bind "Alt q" { Quit; }
         bind "Alt n" { NewPane; }
+        bind "Alt w" { CloseFocus; }
+        bind "Ctrl t" { NewTab; }
+        bind "Ctrl w" { CloseTab; }
         // bind "Alt i" { MoveTab "Left"; }
         // bind "Alt o" { MoveTab "Right"; }
         bind "Alt Left" { MoveFocusOrTab "Left"; }