[Roadmap] @code-ui also as a monaco-editor extension

[softmarshmallow]

This FR Aims making @code-ui also available as a monaco-editor extension, providing the very same UX for customizing & modeling data based on code-like ui.

References

• (Lock lines in monaco editor) Provide ability to block editing specific lines microsoft/monaco-editor#953
• (Custom hover provider) https://microsoft.github.io/monaco-editor/playground.html#extending-language-services-hover-provider-example
• (Draw custom element) https://microsoft.github.io/monaco-editor/playground.html#interacting-with-the-editor-listening-to-mouse-events
• (Custom completion provider) https://microsoft.github.io/monaco-editor/playground.html#extending-language-services-completion-provider-example
• placeholder text - Support placeholder when content is empty microsoft/monaco-editor#1228

[softmarshmallow]

Temporary solution for block-editing lines of code inside specific block.
https://github.com/Pranomvignesh/constrained-editor-plugin