Add IO Intelligence provider support

[eminaruk]

Description:

Add IO Intelligence (io.net) as a new provider.

• Supports chat completions and embeddings endpoints.
• Implements an OpenAI-compatible API interface.
• Base URL: https://api.intelligence.io.solutions/api/v1
• README updated with new provider details.
• Provider constant and configuration added.

Detailed Changes:

1. Created new provider implementation in src/providers/iointelligence/

   • api.ts: API configuration with base URL and authentication headers
   • index.ts: Provider config using OpenAI-compatible parameters (chatCompleteParams,
     embedParams)

2. Updated core gateway files:

   • src/globals.ts: Added IO_INTELLIGENCE constant and registered in VALID_PROVIDERS array
   • src/providers/index.ts: Imported and registered IOIntelligenceConfig

3. Documentation:

   • README.md: Added IO Intelligence to the supported providers table

Tests Run / Test cases added:

Tested locally with the following scenarios:

• Chat completion request with meta-llama/Llama-3.3-70B-Instruct model
• Bearer token authentication verification
• Response format validation (OpenAI-compatible JSON structure)
• Provider attribution in response (provider: "iointelligence")

Type of Change:
New feature

[narengogi]

looks good, please revert the formatting changes in README.md

[ilkhom19]

LGTM