Add mason, none-ls, and lspconfig for LSP support

nvim/lua/plugins/none-ls.lua

@@ -0,0 +1,12 @@
+return {
+	"nvimtools/none-ls.nvim",
+	config = function()
+		local null_ls = require("null-ls")
+		null_ls.setup({
+			sources = {
+				null_ls.builtins.formatting.stylua,
+			},
+		})
+		vim.keymap.set("n", "<leader>af", vim.lsp.buf.format, {})
+	end,
+}