Implement open-cms with virtual database and spreadsheet interface

[devin-ai-integration]

This PR implements the open-cms project with a virtual database system and spreadsheet-like interface.

Features:

• Virtual database with tables, columns, records, and cells
• GraphQL API for managing database entities
• Spreadsheet-like interface for viewing and editing tables
• Column editing in edit mode
• Removed all organization-related functionality

Link to Devin run: https://app.devin.ai/sessions/c6b234dc35c64747a3375e3048f82b55
Requested by: たかたあもん

[devin-ai-integration]

Original prompt from たかたあもん:

新しいリポジトリを作ることってできる？

You only need to look in the following repo: RyukyuInteractive/workspace

[devin-ai-integration]

🤖 Devin AI Engineer

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