config: nvim: add linter/formatter support

config/nvim/lua/plugins.lua

@@ -75,6 +75,23 @@ return require('packer').startup({
 			config = load_config('lspconfig'),
 		}
 
+		--------------------
+		-- Linter/Formatter
+		--------------------
+		use { -- linter and formatter manager
+			'jose-elias-alvarez/null-ls.nvim',
+			after = {
+				'mason.nvim',
+				'plenary.nvim',
+			},
+			requires = { 'nvim-lua/plenary.nvim' },
+		}
+		use { -- compatibility layer between mason and null-ls
+			'jayp0521/mason-null-ls.nvim',
+			after = { 'null-ls.nvim' },
+			config = load_config('null-ls')
+		}
+
 		--------------------
 		-- Snippets
 		--------------------

config/nvim/lua/plugins/null-ls.lua

@@ -0,0 +1,2 @@
+require('null-ls').setup()
+require('mason-null-ls').setup()