feat: nixvim refactor

modules/home-manager/programs/nixvim/presets/base/completion.nix

@@ -0,0 +1,46 @@
+{ lib, config, ... }:
+let
+  cfg = config.presets.base.completion;
+in
+{
+  options.presets.base.completion = {
+    enable = lib.mkEnableOption "completion";
+  };
+
+  config = lib.mkIf cfg.enable {
+    plugins = {
+      luasnip.enable = true;
+      lspkind = {
+        enable = true;
+        mode = "symbol_text";
+      };
+      cmp = {
+        enable = true;
+        settings = {
+          mapping = {
+            "<C-n>" = "cmp.mapping.select_next_item({behavior = cmp.SelectBehavior.Select})";
+            "<C-p>" = "cmp.mapping.select_prev_item({behavior = cmp.SelectBehavior.Select})";
+            "<C-Space>" = "cmp.mapping.confirm({select = true})";
+            "<C-Enter>" = "cmp.mapping.complete()";
+          };
+          sources = [
+            { name = "path"; }
+            { name = "luasnip"; }
+            { name = "nvim_lsp"; }
+            { name = "nvim_lsp_signature_help"; }
+            { name = "nvim_lsp_document_symbol"; }
+          ];
+          formatting.fields = [
+            "abbr"
+            "kind"
+          ];
+          snippet.expand = "function(args) require('luasnip').lsp_expand(args.body) end";
+          window = {
+            completion.border = "rounded";
+            documentation.border = "rounded";
+          };
+        };
+      };
+    };
+  };
+}