feat(config): add project tasks palette with keybinding

dot_config/ghostty/config

@@ -42,6 +42,8 @@ keybind = shift+enter=text:\n
 # command palette: ctrl+space is tmux's root-table C-Space (tmux-palette);
 # sent explicitly as NUL so no keyboard-protocol mode can turn it into a CSI
 keybind = ctrl+space=text:\x00
+# project tasks palette (pj): tmux prefix t
+keybind = ctrl+shift+space=text:\x02t
 
 # tabs → tmux windows
 keybind = ctrl+shift+t=text:\x02c