[Sprint] Define a schema for project duplicate checks

[Only-bottle]

Is there any feature that you would like to add?

You can check if the project name you wish to create is duplicated.

The duplication status is returned as a boolean value.

The schema is as follows.

{
    "is_duplicated": bool
}

Checklits ✅

• I would create a corresponding branch for this issue from the designated (mostly develop) branch.
• This issue only contains a preceding agreement between project owners.