[fix] .dir-locals.el -> .dir-locals-template.el

The settungs in the .dir-locals.el do not work well for every emacs setup:

Add .dir-locals.el to the git-ignore list and move content to a template file.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

.gitignore

@@ -23,3 +23,4 @@ gh-pages/
 .idea/
 
 searx/version_frozen.py
+.dir-locals.el