[Feature]Can support readonly mode?

[nengc]

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• Searched existing issues to avoid creating duplicates.

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Why you want this feature?
After editing, i need to read the document. But now when i click the document, i can still be edited.

Describe the feature request
In read mode, need the document cannot be edited.

Additional context

[Jocs]

A readonly mode will be supported later, in which all editing features will be disabled.