Make application transparency opt-in (#14253)

* Make application transparency opt-in

* Use the transparency helper for Kanagawa

* Address transparency review findings

* Toggle transparency for opaque windows too

default/hypr/apps/davinci-resolve.lua

@@ -1,12 +1,9 @@
--- DaVinci Resolve window focus handling. Kept fully opaque: the default
--- translucency distorts colour-critical grading work.
+-- DaVinci Resolve window focus handling.
 o.window(".*[Rr]esolve.*", {
   float = true,
   stay_focused = true,
   -- Prevent modal dialog pointer warps when focus follows the mouse.
   no_follow_mouse = true,
-  tag = "-default-opacity",
-  opacity = "1 1",
 })
 
 o.window({ class = ".*[Rr]esolve.*", title = "^DaVinci Resolve( Studio)? - .+$" }, { fullscreen = true })