fix(deps): revert dependencies to before pg block was added

[icecrasher321]

Summary

Brief description of what this PR does and why.

Fixes #(issue)

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation
• Other: ___________

Testing

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Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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Project	Deployment	Preview	Comments	Updated (UTC)
docs	Ready	Preview	Comment	Aug 29, 2025 9:28pm
sim (staging)	Building			Aug 29, 2025 9:28pm

[greptile-apps]

Greptile Summary

This PR performs a comprehensive rollback of database integration functionality that was previously added to the SimStudio platform. The changes systematically remove PostgreSQL, MySQL, and Parallel AI integrations across the entire codebase, including:

Database Tools Removed:

• Complete PostgreSQL integration (query, insert, update, delete, execute operations)
• Complete MySQL integration (query, insert, update, delete, execute operations)
• Parallel AI search functionality

Code Changes:

• Dependencies: Removed @types/pg, mysql2, and pg packages from package.json while retaining the postgres package
• API Routes: Deleted all PostgreSQL and MySQL API endpoints (/api/tools/postgresql/* and /api/tools/mysql/*)
• Tools: Removed all database tool configurations and utility functions, cleared tool index files
• Blocks: Removed PostgreSQL, MySQL, and Parallel blocks from the registry and deleted their configuration files
• Types: Removed database-specific TypeScript interfaces and reverted the array type from PrimitiveValueType
• UI Components: Removed PostgresIcon, MySQLIcon, and ParallelIcon from the icons library
• Documentation: Deleted all documentation files for the removed tools

The PR title indicates this reversion addresses dependency issues introduced when the PostgreSQL block was originally added. The changes restore the codebase to use the existing postgres package for core database operations while removing the additional database tool integrations that were layered on top.

Confidence score: 1/5

• This PR contains critical issues that will cause immediate build failures and runtime errors
• Score reflects incomplete cleanup that leaves broken import statements and orphaned registry references
• Multiple files require immediate attention, particularly the MySQL and PostgreSQL tool index files that are empty but still referenced

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