Let Neovim's status line show the terminal background (#967)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

pkgbuilds/omarchy-nvim/lua/plugins/lualine-transparent.lua

@@ -0,0 +1,21 @@
+-- Let the status line show the terminal background, like the rest of the
+-- editor. Lualine's auto theme paints its middle sections a solid colour, so
+-- they are cleared on each theme it builds, which it does again on every
+-- colorscheme change. The mode and position sections keep their colours.
+return {
+	"nvim-lualine/lualine.nvim",
+	opts = function(_, opts)
+		opts.options = opts.options or {}
+		opts.options.theme = function()
+			local theme = require("lualine.utils.loader").load_theme("auto")
+			for _, mode in pairs(theme) do
+				for _, section in ipairs({ "b", "c" }) do
+					if mode[section] then
+						mode[section].bg = "None"
+					end
+				end
+			end
+			return theme
+		end
+	end,
+}