docs: add Task with its description and constraints

[yuki-92c]

Overview

Changes

• I added descriptions and constraints of Task

Task

A specific work or activity that tenants are responsible for performing.

taskId (Identifier)

The TaskId is a UUID

title

The title is a name of the task

Constraints:

• at least 1 character
• less than 20 characters
• can be modified at any time
• must be contained in a Category

description

The Landlord can provide details for a task.

Constraints:

• at least 10 characters
• less than 1000 characters
• can be modified at any time
• can use bold, italic, and a bulleted or numbered list

Assignee Checklist:

• [x] The base branch is correct (no accidental merges)

Reviewer Checklist

• Code readability and simplicity
• Follows best practices and coding standards
• Understandable and maintainable code

[yuki-92c]

Thank you for making changes, but could you revise the PR title as it does not follow our standard?

thanks for the comment! edited the title.