Docs update/add truefoundry (#3245)

* Add TrueFoundry observability integration documentation

- Added comprehensive TrueFoundry integration guide for CrewAI
- Included AI Gateway overview with key features
- Added technical architecture details for Traceloop SDK integration
- Provided step-by-step setup instructions
- Added advanced configuration examples
- Included tracing dashboard screenshot
- Added support contact and documentation links

* Update TrueFoundry integration documentation

Major improvements and fixes:
- Fixed integration pattern to follow LLM provider approach (base_url + api_key)
- Added technical architecture details showing LLM provider and observability flows
- Updated model names to use correct TrueFoundry format (openai-main/gpt-4o, anthropic/claude-3.5-sonnet)
- Added unified-code-tfy.png image for visual code example
- Reorganized document structure with better section placement
- Moved Additional Tracing section to better position
- Added link to TrueFoundry quick start guide
- Added comprehensive observability details and dashboard explanation
- Removed complex tracing setup in favor of simpler LLM provider integration

* Finalize TrueFoundry integration documentation

Key improvements:
- Updated base_url references to use placeholder from code snippet
- Added gateway-metrics.png image for observability dashboard
- Formatted metrics description with proper bullet points and bold headers
- Added link to TrueFoundry tracing overview documentation
- Improved readability and consistency throughout the documentation
- Updated Portuguese translation (pt-BR) version

* added truefoundry.mdx

* updated tfy mdx

* Update docs/en/observability/truefoundry.mdx

Co-authored-by: Nikhil Popli <97437109+nikp1172@users.noreply.github.com>

* Update truefoundry.mdx

* Update truefoundry.mdx

-minor updates

* Update truefoundry.mdx

* updated truefoundry.mdx PT-BR

---------

Co-authored-by: Nikhil Popli <97437109+nikp1172@users.noreply.github.com>

docs/docs.json

@@ -238,7 +238,8 @@
                   "en/observability/opik",
                   "en/observability/patronus-evaluation",
                   "en/observability/portkey",
-                  "en/observability/weave"
+                  "en/observability/weave",
+                  "en/observability/truefoundry"
                 ]
               },
               {
@@ -575,7 +576,8 @@
                   "pt-BR/observability/opik",
                   "pt-BR/observability/patronus-evaluation",
                   "pt-BR/observability/portkey",
-                  "pt-BR/observability/weave"
+                  "pt-BR/observability/weave",
+                  "pt-BR/observability/truefoundry"
                 ]
               },
               {