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/browser.lua

@@ -1,12 +1,10 @@
 -- Browser tags and styling.
 o.window("((google-)?[cC]hrom(e|ium)|[bB]rave-browser|[mM]icrosoft-edge|Vivaldi-stable|helium)", { tag = "+chromium-based-browser" })
 o.window("([fF]irefox|zen|librewolf)", { tag = "+firefox-based-browser" })
-o.window({ tag = "chromium-based-browser" }, { tag = "-default-opacity", tile = true, opacity = "1.0 0.985" })
-o.window({ tag = "firefox-based-browser" }, { tag = "-default-opacity", opacity = "1.0 0.985" })
+o.window({ tag = "chromium-based-browser" }, { tile = true })
 
--- Video apps: remove chromium browser tag so they don't get opacity applied.
+-- Video apps: remove the chromium browser tag so they can float.
 o.window("(^.+-youtube\\.com__.*$|^.+-app\\.zoom\\.us__wc_home.*$)", { tag = "-chromium-based-browser" })
-o.window("(^.+-youtube\\.com__.*$|^.+-app\\.zoom\\.us__wc_home.*$)", { tag = "-default-opacity" })
 
 -- Hide screen sharing notification windows.
 o.window({ title = ".*is sharing.*" }, { workspace = "special silent" })