feat: improvements

Description

• Features:
  • Reset clone route
  • Patch clone route
  • Get DB user credentials from clone creation request and add the user to DB
  • Set random passwords to other DB users except the one used for management
  • Improved time format
  • Logs and mount dirs can now be configured
  • Base version of get snapshot list
  • Get actual data about ZFS pool (size, free, used)
  • Add DataStateAt field
• Tests:
  • cloning converted to interface
  • Add cloning mock for server tests
  • Improved utils tests
• Refactoring:
  • Split models to different files
  • Split utils to different files

Related issue

#16 (closed) #6

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes and they have been reviewed OR there are no API changes