feat: add GCP connectors (bucket list, table creation)

[srijayababu]

📝 Description

This PR introduces two new Google Cloud components:

• GCPBigQuery: Provides functionality for creating tables and managing datasets in BigQuery.
• GCPBucket: Supports listing Google Cloud Storage (GCS) buckets.

Changes include:

• Added GCPBigQuery.class.ts and GCPBucket.class.ts under components/.
• Registered both components in components/index.ts.
• Updated package.json with new dependencies:

 • `@google-cloud/bigquery` • `@google-cloud/storage` 

🔗 Related Issues

• Fixes # (if applicable)
• Relates to # (if applicable)

🔧 Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 📚 Documentation update
• 🔧 Code refactoring (no functional changes)
• 🧪 Test improvements
• 🔨 Build/CI changes

✅ Checklist

• Self-review performed
• Tests added/updated
• Documentation updated (if needed)

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