plugins/nvim-jdtls: allow lua on nvim-jdtls.data

Make it possible to set data directory with lua, so it can be project-dependent.

plugins/languages/nvim-jdtls.nix

@@ -44,7 +44,7 @@ in
     '';
 
     data = mkOption {
-      type = types.nullOr types.str;
+      type = helpers.nixvimTypes.maybeRaw (with types; nullOr str);
       default = null;
       example = "/home/YOUR_USERNAME/.cache/jdtls/workspace";
       description = ''