Use theme config templates with singular color definition (#4053)

* Attempt to templaterize the theme specific files

* Cleanup

* Slim down

* Combine render into -set

* Pull out the dynamic template rendering again, but simpler

* Fix vars

* Variables are lowercase

* Better presentation

* Fix missing colors

* Provide stripped values too

* Fix colors for regular hex format

* Bring back explicit btop themes

They're too involved to derive from a basic color set

* Make an atomic swap of the theme directories

* No longer used by walker to cancel

* Explain why

* Remove redundant const

* Consistent const naming

* No longe have $THEMES_DIR

* Correct the blue

* Set opencode colors too

* Fix colors for readability

* Move the templates together with the others in default

* Split user themes and default themes

* Fix paths

* Look for both user themes and default themes

Plus speed things up

* Migrate to the new setup where default themes live inside omarchy

* Explicitly store the name of the current theme

* Cleanup

* No longer need omarchy-theme-next since themes are now fully rendered, not symlinks

* Get current theme name from the new theme.name file

* Look for user background images in dedicated directory

* Need yq for toml

* Need yq to parse colors.toml

* Look for backgrounds matching the new theme.name

We no longer have symlinks

* Migrate existing user backgrounds to the new proper location

* Install user backgrounds in the correct path

* Fix quoting

* Just rely on the system theme for opencode and get ready for USRSIG2 being available to live reload

* Fix template generation for rgb colors

themes/ethereal/colors.toml

@@ -0,0 +1,26 @@
+accent = "#7d82d9"
+active_border_color = "#7d82d9"
+active_tab_background = "#060B1E"
+
+cursor = "#ffcead"
+foreground = "#ffcead"
+background = "#060B1E"
+selection_foreground = "#060B1E"
+selection_background = "#ffcead"
+
+color0 = "#060B1E"
+color1 = "#ED5B5A"
+color2 = "#92a593"
+color3 = "#E9BB4F"
+color4 = "#7d82d9"
+color5 = "#c89dc1"
+color6 = "#a3bfd1"
+color7 = "#F99957"
+color8 = "#6d7db6"
+color9 = "#faaaa9"
+color10 = "#c4cfc4"
+color11 = "#f7dc9c"
+color12 = "#c2c4f0"
+color13 = "#ead7e7"
+color14 = "#dfeaf0"
+color15 = "#ffcead"