nvim: move to services we do not specify a pkgset

services/nvim/lsp/c.nix

@@ -0,0 +1,21 @@
+{
+  lib,
+  config,
+  pkgs,
+  ...
+}:
+
+lib.optionalAttrs (lib.elem "nvim::lsp::c" config.machine.pkgs) {
+  ccls = {
+    cmd = [ "${pkgs.ccls}/bin/ccls" ];
+    init_options = {
+      # compilationDatabaseDirectory = "build";
+      index = {
+        threads = 0;
+      };
+      clang = {
+        excludeArgs = [ "-frounding-math" ];
+      };
+    };
+  };
+}