plugins/nvim-cmp: add alwaysComplete option

Disabling this option makes the completion window not popup by default,
requiring manual activation.

docs/release-notes/rl-0.6.md

@@ -88,3 +88,7 @@ Release notes for release 0.6
 
 - Added plugin auto-discovery from plugin inputs. This is mostly from
   [JordanIsaac's neovim-flake](https://github.com/jordanisaacs/neovim-flake)
+
+[jacekpoz](https://github.com/jacekpoz):
+
+- Added `vim.autocomplete.alwaysComplete`. Allows users to have the autocomplete window popup only when manually activated.

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

@@ -219,6 +219,7 @@ in {
 
         completion = {
           completeopt = 'menu,menuone,noinsert',
+          ${optionalString (!cfg.alwaysComplete) "autocomplete = false"}
         },
 
         formatting = {

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

@@ -1,11 +1,17 @@
 {lib, ...}: let
   inherit (lib.options) mkEnableOption mkOption literalMD;
   inherit (lib.nvim.binds) mkMappingOption;
-  inherit (lib.types) enum attrsOf nullOr str;
+  inherit (lib.types) enum attrsOf nullOr str bool;
 in {
   options.vim = {
     autocomplete = {
-      enable = mkEnableOption "enable autocomplete" // {default = false;};
+      enable = mkEnableOption "autocomplete" // {default = false;};
+
+      alwaysComplete = mkOption {
+        type = bool;
+        description = "Automatically show completion.";
+        default = true;
+      };
 
       mappings = {
         complete = mkMappingOption "Complete [nvim-cmp]" "<C-Space>";