Add description to project

[pktiuk]

Partially linked with: #3680

Motivation and context

I think it would be very handy to have at least a short description of project available in CVAT.
It could help with organizing and adding context to Projects.

How has this been tested?

I just deployed it with help of the docker-compose.dev.yml you provided.

For now this is just a draft, because before finishing this feature I would like to get feedback from cvat maintainers.

Checklist

• I submit my changes into the develop branch
• I have added a description of my changes into the CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (see GitHub docs)
• I have increased versions of npm packages if it is necessary
  (cvat-canvas,
  cvat-core,
  cvat-data and
  cvat-ui)

Other things to do:

• Fix checks
• Allow searching descriptions

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.

[pktiuk]

This is arbitrary length I propose, but maybe you think it would be good to change it.
I am also not sure which field type you would recommend SafeCharField or regular CharField

[bsekachev]

Hi, @pktiuk

Thank you for your contribution. But we are now working on more powerful project/task description.

#6191

[pktiuk]

Good to know.
That's a shame it was not linked with the issue #3680 earlier.