feat: add form locking mechanism and share edit permission

[Chartman123]

• lock form in backend
• add lockedBy and lockedUntil to getForm and getForms
• adjust documentation to reflect changes in form data structure and API behavior.
• allow adding edit permission to shares in frontend (backend already handles it correctly)
• respect locked form state in frontend
• allow form owner to lock form completely
• allow form owner to remove a lock
• add/adjust tests

What should someone with edit permissions be able to do?

• only the form owner can transfer ownership
• only the form owner can lock a form completely/remove an existing lock
• edit form:
  • title
  • description
  • submissionMessage
  • expiration
  • show expiration
  • state closed
  • state archived
  • anonymous answers
  • submit once/multiple
  • allow edit submissions
  • edit access (permitAllUsers, showToAllUsers)
  • link/unlink files
• delete form
• add/edit/delete questions
• add/edit/delete options
• add/edit/delete shares

[hamza221]

#936

[codecov]

Codecov Report

Attention: Patch coverage is 31.16279% with 148 lines in your changes missing coverage. Please review.

Project coverage is 44.21%. Comparing base (c10f2a4) to head (0194dbf).
Report is 3 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2737      +/-   ##
============================================
- Coverage     45.58%   44.21%   -1.38%     
- Complexity      984     1019      +35     
============================================
  Files            79       80       +1     
  Lines          3565     3662      +97     
============================================
- Hits           1625     1619       -6     
- Misses         1940     2043     +103     

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[Chartman123]

@susnux @hamza221 should be ready for a first review :)