feat(tailwind-sorter.lua): add tailwind-sorter plugin and configuration

The tailwind-sorter.lua file was added to the absolute/after directory. This file sets up the tailwind-sorter plugin with the following configuration:
- on_save_enabled is set to true, enabling the plugin to run on file save.
- on_save_pattern is set to a list of file patterns for which the plugin should run on save. The patterns include "*.html", "*.js", "*.jsx", "*.tsx", "*.twig", "*.hbs", "*.php", "*.heex", "*.astro", and "*.vue".

Additionally, the tailwind-sorter.lua file was added to the absolute/plugins directory. This file returns a table with the following properties:
- The first element is the plugin name "laytan/tailwind-sorter.nvim".
- The dependencies property specifies the required plugins "nvim-treesitter/nvim-treesitter" and "nvim-lua/plenary.nvim".
- The build property specifies the build command to be executed in the "formatter" directory. This command installs the necessary npm packages and builds the plugin.
- The config property is a function that requires the "absolute.after.tailwind-sorter" module, which contains the plugin configuration.

These changes were made to add the tailwind-sorter plugin to the project and configure it for use.

lua/absolute/plugins/tailwind-sorter.lua

@@ -0,0 +1,8 @@
+return {
+	"laytan/tailwind-sorter.nvim",
+	dependencies = { "nvim-treesitter/nvim-treesitter", "nvim-lua/plenary.nvim" },
+	build = "cd formatter && npm i && npm run build",
+	config = function()
+		require("absolute.after.tailwind-sorter")
+	end,
+}