add(config): add information to the config file (#766)

- add information to configuration directly to the config file

zellij-utils/assets/config/default.yaml

@@ -1,4 +1,10 @@
 ---
+# Configuration for zellij.
+
+# In order to troubleshoot your configuration try using the following command:
+# `zellij setup --check`
+# It should show current config locations and features that are enabled.
+
 keybinds:
     unbind: true
     normal:
@@ -262,3 +268,35 @@ plugins:
 #   - detach (Default)
 #   - quit
 #on_force_close: quit
+
+# Send a request for a simplified ui (without arrow fonts) to plugins
+# Options:
+#   - true
+#   - false (Default)
+#simplified_ui: true
+
+# Choose the path to the default shell that zellij will use for opening new panes
+# Default: $SHELL
+# default_shell: fish
+
+# Toggle between having pane frames around the panes
+# Options:
+#   - true
+#   - false (default)
+#no_pane_frames: true
+
+# Choose the theme that is specified in the themes section.
+# Default: default
+#theme: default
+
+# Choose the mode that zellij uses when starting up.
+# Default: normal
+#default_mode: locked
+
+# Toggle enabling the mouse mode.
+# On certain configurations, or terminals this could
+# potentially interfere with copying text.
+# Options:
+#   - true
+#   - false (default)
+#disable_mouse_mode: true