Add dynamic theming for gum (#4467)

* Add dynamic theming for gum.

* Add migration.

* Fix migration script.

* Add omarchy-theme-reset utility.

* Move env variables into seperate file and update migration script.

* Migration adds the new hyprland config file to the users hyprland.conf.

* Add gum.env.conf to default env.conf instead.

* Reuse new omarchy-theme-refresh and update migration.

* Ensure no errors are thrown if the file can't be loaded

* Just apply this on the next theme selection

So it's not disruptive

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>

default/hypr/envs.conf

@@ -1,3 +1,8 @@
+# GUM environment variables for styling purposes
+# hyprlang noerror true
+source = ~/.config/omarchy/current/theme/gum.env.conf
+# hyprlang noerror false
+
 # Cursor size
 env = XCURSOR_SIZE,24
 env = HYPRCURSOR_SIZE,24

default/hypr/looknfeel.conf

@@ -138,10 +138,3 @@ cursor {
 binds {
     hide_special_on_workspace_change = true
 }
-
-# Style Gum confirm to match terminal theme
-env = GUM_CONFIRM_PROMPT_FOREGROUND,6       # Cyan
-env = GUM_CONFIRM_SELECTED_FOREGROUND,0     # Black
-env = GUM_CONFIRM_SELECTED_BACKGROUND,2     # Green
-env = GUM_CONFIRM_UNSELECTED_FOREGROUND,7   # White
-env = GUM_CONFIRM_UNSELECTED_BACKGROUND,8   # Dark grey