Multiple person working on the same project.

[hunterhector]

Describe the bug
When two users are working on one project simultaneously, it will create problems to synchronize their efforts.

To Reproduce
Steps to reproduce the behavior:

1. Open two accounts and edit the same table at the same time.

Expected behavior
The system should either allow one user to edit at one time or handle synchronized operations.

1. One user will lock the document when editing the project. This user will be logged out automatically after some timeout.
2. Support simultaneous edit to the same file.

Screenshots
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Environment (please complete the following information):

• OS: [e.g. iOS]
• Version [e.g. 22]
• Node Versions or other

Additional context
Add any other context about the problem here.