[feat] engines: add fastbot engine (general) (#6232)

- adds support for https://fastbot.de
- the results are really fast and mostly in English (even though it's a German
  engine)

searx/settings.yml

@@ -937,6 +937,24 @@ engines:
     timeout: 3.0
     disabled: true
 
+  - name: fastbot
+    engine: xpath
+    search_url: https://fastbot.de/search?q={query}
+    results_xpath: //section[contains(@class, 'organic-results')]/div[contains(@class, 'result-item')]
+    url_xpath: (./a/@href)[last()]
+    title_xpath: (./a)[last()]
+    content_xpath: ./div[contains(@class, 'snippet')]
+    suggestion_xpath: //section[contains(@class, 'related-searches')]//a/span[1]
+    shortcut: fa
+    categories: general
+    disabled: true
+    about:
+      website: https://fastbot.de
+      official_api_documentation:
+      use_official_api: false
+      require_api_key: false
+      results: HTML
+
   - name: fdroid
     engine: fdroid
     shortcut: fd