feat: refactor and separate LSP/language configurations

modules/completion/nvim-cmp/config.nix

@@ -1,4 +1,5 @@
 {
+  pkgs,
   lib,
   config,
   ...
@@ -6,15 +7,22 @@
 with lib;
 with builtins; let
   cfg = config.vim.autocomplete;
+  builtSources =
+    concatMapStringsSep "\n" (x: "{ name = '${x}'},") cfg.sources;
 in {
   config = mkIf cfg.enable {
     vim.startPlugins = [
-      "vim-vsnip"
       "nvim-cmp"
       "cmp-buffer"
       "cmp-vsnip"
       "cmp-path"
-      "cmp-treesitter"
+    ];
+
+    vim.autocomplete.sources = [
+      "nvim-cmp"
+      "vsnip"
+      "buffer"
+      "path"
     ];
 
     vim.luaConfigRC.completion = mkIf (cfg.type == "nvim-cmp") (nvim.dag.entryAnywhere ''
@@ -35,12 +43,7 @@ in {
           end,
         },
         sources = {
-          ${optionalString (config.vim.lsp.enable) "{ name = 'nvim_lsp' },"}
-          ${optionalString (config.vim.lsp.rust.enable) "{ name = 'crates' },"}
-          { name = 'vsnip' },
-          { name = 'treesitter' },
-          { name = 'path' },
-          { name = 'buffer' },
+          ${builtSources}
         },
         mapping = {
           ['<C-d>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), { 'i', 'c' }),