Support for COMMENT

[Baysul]

Is your feature request related to a problem? Please describe.
No.

Describe the solution you'd like
Make it so the description parameter is used to COMMENT on columns when Tortoise.generate_schemas is called, or have a separate field entirely named comment. For tables, I'm not sure what the best solution would be, maybe a metadata field?

Describe alternatives you've considered
Issuing the COMMENT commands manually.

[grigi]

Thank you for the issue report.
We just added a description="..." parameter to all fields, and we can use it to omit COMMENT '...' when generating DDL.

This actually should be quite easy to do :-)
I confirmed all our supported databases support that syntax. The only "consideration" is that we need to handle basic escaping (at least we don't deal with user input here)

[harshanarayana]

@grigi Can I pick this one up?

[grigi]

Sure!

[grigi]

Thanks to @harshanarayana we have initial support for this in v0.12.3 \o/