specify generated operation

[maha-hajja]

Description

adds a param to specify the generated record's operation, can be "create", "update", "delete", "snapshot" and "random" to randomize one of the four operations.

Fixes #67

Quick checks:

• I have followed the Code Guidelines.
• There is no other pull request for the same update/change.
• I have written unit tests.
• I have made sure that the PR is of reasonable size and can be easily reviewed.

[raulb]

Code looks good, but I'm concerned if we ship this without making the changes to actually make use of this operation. i.e.: One user could see this and try it out, but then it wouldn't take any effect. I think we shouldn't merge this to main unless we complete the functionality.

[raulb]

Code looks good, but I'm concerned if we ship this without making the changes to actually make use of this operation. i.e.: One user could see this and try it out, but then it wouldn't take any effect. I think we shouldn't merge this to main unless we complete the functionality.

Scratch that! I forgot the generator is going to really "simply" include the operation in the generated record, but not mutate it any other way!