feat: updated task_comment information to include if comment owned by user

[mariejp]

Description

Getting a task_comment model now returns an object with these fields:
{
"id": self.id,
"sent_by_me": sent_by_me,
"user": {
"id": self.user_id,
"name": self.user_name,
},
"user_id": self.user_id,
"task_id": self.task_id,
"relation_id": self.relation_id,
"creation_date": self.creation_date,
"modification_date": self.modification_date,
"comment": self.comment,
}

Fixes # [685]

Type of Change:

• Code
• Enhancement

How Has This Been Tested?

I ran the unit tests again, making sure to run python -m unittest discover tests with my updated code.

Checklist:

• My PR follows the style guidelines of this project

• I have performed a self-review of my own code or materials

• Any dependent changes have been merged

• My changes generate no new warnings

• New and existing unit tests pass locally with my changes

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