Enhancement/Search by user name

[fanesz]

kasSubmissions and financialRequests table have relation to users. Currently, there is only filter by date and by payment status.
Because user name is embedded with user, it's quite challenging to create the filter for the user name, not as same as status, because status have direct status_id as foreign key.
Todo:

• Create filter by user name for
  • kas submission get all route
  • financial request get all route
• if possible, create global filter builder for specific embedded field such as this user name
• make sure everything is working including the pagination
• make sure the changes not affect to other filter
• make sure to not add any unnecessary field or table
• make sure to not use any raw query unless there is no other way

Related docs: Gorm