Proposed changes

This PR introduces the initial version of a standalone code editor component that can be integrated into low-code applications. The code editor supports theme switching, syntax highlighting, multi-language support, a minimap for code navigation, sticky scroll for header visibility, code folding for better readability, and a read-only mode for viewing code without editing.

Issue: #1448

Screenshot 2025年07月05日 210943
Screenshot 2025年07月05日 211012
Screenshot 2025年07月05日 211417

Types of changes

What types of changes does your code introduce to Lowcoder?
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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

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This is simply a reminder of what we are going to look for before merging your code.
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• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules