Add deepl translation quicksearch to qutebrowser

Added deepl translation search engine with dt (deepl-translate). Moved
google translation to gt (google-translate) to correspond for both
engines.

.config/qutebrowser/config.py

@@ -135,10 +135,11 @@ config.bind(leader + "VV", "config-source")
 c.url.searchengines = {
     "DEFAULT": "https://duckduckgo.com/?q={}",
     "d": "https://www.dict.cc/?s={}",
+    "gt": "https://translate.google.com/#auto/de/{}",
+    "dt": "https://www.deepl.com/translator#en/de/{}",
     "g": "https://www.google.com/search?q={}",
     "r": "https://old.reddit.com/r/{}",
     "w": "https://en.wikipedia.org/w/index.php?search={}",
-    "gt": "https://translate.google.com/#auto/de/{}",
     "gh": "https://github.com/search?q={}",
     "al": "https://wiki.archlinux.org/index.php/{}",
     "aur": "https://aur.archlinux.org/packages/?K={}",