refactor(nvim): clean up directory structure

homeManagerModules/neovim/langs/rust/default.nix

@@ -0,0 +1,38 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib) attrValues mkIf;
+
+  cfg = config.programs.neovim;
+in
+  mkIf cfg.enableIde {
+    programs = {
+      neovim = {
+        extraPackages = attrValues {
+          inherit
+            (pkgs)
+            cargo
+            rustc
+            rust-analyzer
+            rustfmt
+            ;
+        };
+
+        extraLuaConfig =
+          # lua
+          ''
+            vim.api.nvim_create_autocmd('FileType', {
+               pattern = { 'rust' },
+               command = 'setlocal ts=4 sw=4 sts=0 expandtab',
+            });
+
+            require('lspconfig').rust_analyzer.setup({
+                capabilities = require('cmp_nvim_lsp').default_capabilities(),
+            });
+          '';
+      };
+    };
+  }