Expand all remaining provider pages (Cohere, Groq, DeepSeek, OpenRouter, Together, Fireworks, Perplexity, Cerebras, Bedrock, Azure)

[AmitoVrito]

Each remaining provider page needs:

• Full model list with context window and pricing
• LLMConfig parameters specific to that provider
• Streaming example
• Function calling example (if supported)
• Error handling common to that provider
• Cost tracking integration

Providers: cohere.md, groq.md, deepseek.md, openrouter.md, together.md, fireworks.md, perplexity.md, cerebras.md, bedrock.md, azure-openai.md

[AmitoVrito]

Completed in PR #99 — all remaining provider pages expanded: groq, deepseek, openrouter, together, fireworks, perplexity, cerebras, bedrock, azure-openai, cohere, mistral.