refactor!: restructure and document configuration

modules/neovim/lua/plugins/mason.lua

@@ -0,0 +1,31 @@
+-- Customize Mason plugins
+
+---@type LazySpec
+return {
+  -- use mason-lspconfig to configure LSP installations
+  {
+    "williamboman/mason-lspconfig.nvim",
+    -- overrides `require("mason-lspconfig").setup(...)`
+    opts = function(_, opts)
+      opts.ensure_installed = nil
+      opts.automatic_installation = false
+    end,
+  },
+  -- use mason-null-ls to configure Formatters/Linter installation for null-ls sources
+  {
+    "jay-babu/mason-null-ls.nvim",
+    -- overrides `require("mason-null-ls").setup(...)`
+    opts = function(_, opts)
+      opts.ensure_installed = nil
+      opts.automatic_installation = false
+    end,
+  },
+  {
+    "jay-babu/mason-nvim-dap.nvim",
+    -- overrides `require("mason-nvim-dap").setup(...)`
+    opts = function(_, opts)
+      opts.ensure_installed = nil
+      opts.automatic_installation = false
+    end,
+  },
+}