Add theme ethereal (#3464)

* Add theme Ethereal

* Update to follow the Omarchy hot reload

* Add aether to all themes

* Add a vscode theme

* Revert "Add aether to all themes"

This reverts commit 421f467e21.

* Format the kitty file

* Make available to all via migration

* Fix

* Add hot reload

* Change the background image to something of higher quality

This looks a lot better on a 6K monitor

* Highlight border color should be brighter than inactive color

* Add preview.png for new visual theme selector

* Add the ethereal nvim variant of aehter

---------

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

themes/ethereal/alacritty.toml

@@ -0,0 +1,28 @@
+[colors]
+[colors.primary]
+background = "#060B1E"
+foreground = "#ffcead"
+
+[colors.normal]
+black   = "#060B1E"
+red     = "#ED5B5A"
+green   = "#92a593"
+yellow  = "#E9BB4F"
+blue    = "#7d82d9"
+magenta = "#c89dc1"
+cyan    = "#a3bfd1"
+white   = "#F99957"
+
+[colors.bright]
+black   = "#6d7db6"
+red     = "#faaaa9"
+green   = "#c4cfc4"
+yellow  = "#f7dc9c"
+blue    = "#c2c4f0"
+magenta = "#ead7e7"
+cyan    = "#dfeaf0"
+white   = "#ffcead"
+
+[colors.cursor]
+text   = "#060B1E"
+cursor = "#ffcead"