Update Polymarket documentation (2026-02-19)

- Added new documentation URLs from llms.txt index
- Updated TARGET.md with 244 total documentation pages
- Scraped new pages for trading, concepts, and API reference sections
- Updated changelog and new index pages

docs/api-reference/search/search-markets-events-and-profiles.md

@@ -8,7 +8,7 @@
 
 ## OpenAPI
 
-````yaml api-reference/gamma-openapi.json get /public-search
+````yaml api-spec/gamma-openapi.yaml get /public-search
 openapi: 3.0.3
 info:
   title: Markets API
@@ -1344,4 +1344,4 @@ components:
           type: string
           nullable: true
 
-````
+````