Build: Add . dot as word boundary in Typesense and downrank non-API pages

Override the default from
https://github.com/typesense/typesense-docsearch-scraper/blob/0.6.0/scraper/src/typesense_helper.py#L58

> 'token_separators': ['_', '-']

This should make it so that "jQuery.ajax" is tokenised as "jquery ajax"
instead of "jqueryajax".

Ref typesense/typesense-docsearch-scraper#40.

Author: Krinkle

docsearch.config.json

@@ -1,8 +1,8 @@
 {
   "index_name": "jquery_com",
   "start_urls": [
-    { "url": "https://jquery.com" },
-    { "url": "https://api.jquery.com", "selectors_key": "api" }
+    { "url": "https://api.jquery.com", "selectors_key": "api", "page_rank": 20 },
+    { "url": "https://jquery.com", "page_rank": 10 }
   ],
   "stop_urls": [
     ".com/category/"
@@ -34,6 +34,9 @@
       "text": ".entry-content p, .entry-content li"
     }
   },
+  "custom_settings": {
+    "token_separators": ["_", "-", "."]
+  },
   "selectors_exclude": [
     "header ~ article",
     ".returns",