Support for `flake8-annotations-coverage`

Hey, we are currently using [`flake8-annotations-coverage`](https://github.com/best-doctor/flake8-annotations-coverage) in our FOSS [`py-template`](https://github.com/inovintell/py-template) project, but we would like to move to `ruff` exclusively from `flake8` + `flakeheaven`.

This plugin basically allows you to set minimum percentage coverage for annotations and raise if it is not fulfilled.

### Error Codes

- TAE001 - Too few type annotations in file

Is support for [`flake8-annotations-coverage`](https://github.com/best-doctor/flake8-annotations-coverage) planned/would be considered? Unfortunately we cannot pick up this issue ourselves at the current time.

Start by reading the linked flake8-annotations-coverage project and its definition of TAE001, then compare that behavior with Ruff's existing annotation-related linting. Determine the supported configuration and expected diagnostics before identifying the appropriate Ruff entry point. Done means Ruff can enforce a minimum annotation percentage and report TAE001-equivalent failures with coverage tests.

Written by the indexing model from the issue text.