feat: discord action provider

[xiaoxiaff]

Description

Added Discord Action Provider to AgentKit, enabling AI agents to interact with Discord channels and messages.

🚀 What's New

• Discord Action Provider: New action provider for Discord bot operations
• CARV Integration: Enhanced CARV Action Provider with Twitter ID to address lookup
• Test Coverage: Comprehensive unit tests for Discord provider

Tests

PASS src/action-providers/discord/discordActionProvider.test.ts
Also has done the e2e test.

Checklist

A couple of things to include in your PR for completeness:

• Added documentation to all relevant README.md files
• Added a changelog entry

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2