NVIM: Improved structure and improved lazy loading

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

@@ -0,0 +1,23 @@
+return {
+  -- bridge mason and null-ls
+  "jay-babu/mason-null-ls.nvim",
+  lazy = true, -- load as dependency
+  opts = {
+    automatic_installation = true,
+    ensure_installed = {
+      -- assembler
+      "asmfmt",
+      -- lua
+      "stylua",
+      -- markdown
+      "mdformat",
+      -- python
+      "isort",
+      "yapf",
+      -- shell
+      "shfmt",
+      -- yaml
+      "yamlfmt",
+    },
+  },
+}