feat: Add SPL Governance Integration for DAO Management

[onyedikachi-david]

Description

This PR adds support for SPL Governance program interactions to the Solana Agent Kit, enabling agents to participate in and manage DAO governance activities programmatically.

Features Added

• Realm configuration management and monitoring
• Council member operations (add/remove/update weights)
• Token-based voting power management
• Governance configuration settings

Implementation Details

• Added new modules in src/actions/:
  • council-governance.ts: Council member management
  • governance.ts: Core governance functionality
  • governance-monitor.ts: Monitoring capabilities
• Integrated with SPL Governance program for DAO operations
• Added type definitions in src/types/governance.ts

Related Issue

Closes #167

Type of Change

• New feature (non-breaking change which adds functionality)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings.
  This pull request was created for https://app.gib.work/bounties/7aafcb80-c155-45f5-a53f-46fdf319a113 in an attempt to solve a bounty Realm Management | SPL Governance Integration for Solana Agent Kit | realms.today #167 . Payment for the bounty is immediately sent to the contributor after merge.

[onyedikachi-david]

@thearyanag The PR is ready for review.