[Feat]: Add code editor as a standalone component

[Nangelov7]

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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

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)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation Update (if none of the other choices apply)

Checklist

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• [x] 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