Remove the concept of project from the CLI

[gdlg]

Summary

Remove the concept of project from the CLI

Part of #1809

How to test

Checklist

• I have added unit tests to cover my changes.​
• I have added integration tests to cover my changes.​
• I have added the description of my changes into CHANGELOG.​
• I have updated the documentation accordingly

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below).

# Copyright (C) 2025 Intel Corporation
#
# SPDX-License-Identifier: MIT

[AlbertvanHouten]

There are still quite a few references to project throughout the code base such as the error messages in src/datumaro/components/errors.py and the project builder in src/datumaro/components/project.py.

src/datumaro/project.py can also be deleted

[gdlg]

There are still quite a few references to project throughout the code base such as the error messages in src/datumaro/components/errors.py and the project builder in src/datumaro/components/project.py.

src/datumaro/project.py can also be deleted

That’s intended. Since this PR is already quite large, I wanted to focus on the CLI and not change the API. I will delete those in the next PR.

[AlbertvanHouten]

Ah apologies, I didn't notice you specifically targeted the CLI.