feat: Add C++ support (clangd) (#8)

Author: dotunwrap

config/langs/cpp.nix

@@ -0,0 +1,16 @@
+{
+  plugins = {
+    lsp.servers.clangd = {
+      enable = true;
+      cmd = [
+        "clangd"
+        "--background-index"
+      ];
+      filetypes = [
+        "c"
+        "cpp"
+      ];
+    };
+    treesitter.settings.ensure_installed = [ "c" "cpp" ];
+  };
+}