refactor: clean up user example files to be easier to follow

lua/plugins/highlights.lua

@@ -0,0 +1,16 @@
+if true then return {} end -- REMOVE THIS LINE TO ACTIVATE THIS FILE
+
+-- AstroUI allows you to easily modify highlight groups easily for any and all colorschemes
+return {
+  "AstroNvim/astroui",
+  opts = {
+    highlights = {
+      init = { -- this table overrides highlights in all themes
+        -- Normal = { bg = "#000000" },
+      },
+      astrotheme = { -- a table of overrides/changes when applying the astrotheme theme
+        -- Normal = { bg = "#000000" },
+      },
+    },
+  },
+}