add neeva web engine

Neeva is "the world's first ad-free, private search engine" and uses data from Apple, Bing, Yelp and "others".
They claim to crawl "hundreds of millions" of URLs a day (https://twitter.com/Neeva/status/1536447373903335426).

searx/settings.yml

@@ -960,6 +960,30 @@ engines:
   #   collection: 'reviews'  # name of the db collection
   #   key: 'name'  # key in the collection to search for
 
+  - name: neeva
+    engine: xpath
+    shortcut: nv
+    search_url: https://neeva.com/search?q={query}&c=All&src=Pagination&page={pageno}{time_range}
+    results_xpath: //div[@class="web-index__component-2rKiM"] | //li[@class="web-rich-deep-links__deepLink-SIbD4"]
+    url_xpath: .//a[@class="lib-doc-title__link-1b9rC"]/@href | ./h2/a/@href
+    title_xpath: .//a[@class="lib-doc-title__link-1b9rC"] | ./h2/a
+    content_xpath: >
+      .//div[@class="lib-doc-snippet__component-3ewW6"]/text() |
+      .//div[@class="lib-doc-snippet__component-3ewW6"]/*[not(self::a)] |
+      ./p
+    content_html_to_text: true
+    suggestion_xpath: //span[@class="result-related-searches__link-2ho_u"]
+    paging: true
+    disabled: true
+    categories: [general, web]
+    timeout: 5.0
+    about:
+      website: https://neeva.com
+      official_api_documentation:
+      use_official_api: false
+      require_api_key: false
+      results: HTML
+
   - name: npm
     engine: json_engine
     paging: true