treewide: begin restructuring the module tree

modules/plugins/completion/nvim-cmp/nvim-cmp.nix

@@ -0,0 +1,66 @@
+{lib, ...}: let
+  inherit (lib.options) mkEnableOption mkOption literalMD;
+  inherit (lib.nvim.binds) mkMappingOption;
+  inherit (lib.types) enum attrsOf nullOr str;
+in {
+  options.vim = {
+    autocomplete = {
+      enable = mkEnableOption "enable autocomplete" // {default = false;};
+
+      mappings = {
+        complete = mkMappingOption "Complete [nvim-cmp]" "<C-Space>";
+        confirm = mkMappingOption "Confirm [nvim-cmp]" "<CR>";
+        next = mkMappingOption "Next item [nvim-cmp]" "<Tab>";
+        previous = mkMappingOption "Previous item [nvim-cmp]" "<S-Tab>";
+        close = mkMappingOption "Close [nvim-cmp]" "<C-e>";
+        scrollDocsUp = mkMappingOption "Scroll docs up [nvim-cmp]" "<C-d>";
+        scrollDocsDown = mkMappingOption "Scroll docs down [nvim-cmp]" "<C-f>";
+      };
+
+      type = mkOption {
+        type = enum ["nvim-cmp"];
+        default = "nvim-cmp";
+        description = "Set the autocomplete plugin. Options: [nvim-cmp]";
+      };
+
+      sources = mkOption {
+        description = ''
+          Attribute set of source names for nvim-cmp.
+
+          If an attribute set is provided, then the menu value of
+          `vim_item` in the format will be set to the value (if
+          utilizing the `nvim_cmp_menu_map` function).
+
+          Note: only use a single attribute name per attribute set
+        '';
+        type = attrsOf (nullOr str);
+        default = {};
+        example = ''
+          {nvim-cmp = null; buffer = "[Buffer]";}
+        '';
+      };
+
+      formatting = {
+        format = mkOption {
+          description = ''
+            The function used to customize the appearance of the completion menu.
+
+            If [](#opt-vim.lsp.lspkind.enable) is true, then the function
+            will be called before modifications from lspkind.
+
+            Default is to call the menu mapping function.
+          '';
+          type = str;
+          default = "nvim_cmp_menu_map";
+          example = literalMD ''
+            ```lua
+            function(entry, vim_item)
+              return vim_item
+            end
+            ```
+          '';
+        };
+      };
+    };
+  };
+}