Multiple flychecks with different commands for single workspace

I'd like to have rust analyzer run one flycheck with clippy and another with cargo doc so that I can also fix documentation issues.

The only workaround I have found until now is to change the command and restart RA or possibly have an utility that runs both so that RA sees it as a single cargo command.

This would probably mean that the rust-analyzer.check.* settings would have to be merged into one object and there would have to be an array of these.

For example cargo doc does not support --all-targets but I'd like to keep that setting for clippy.

An alternative would be to add a second flycheck specifically for running cargo docs with its own rust-analyzer.docs-check.* configurations. It might be enough (probably would be for me), but maybe there would be other use cases for running multiple different flychecks.

No implementation files or tests are named. Start by tracing the rust-analyzer.check.* settings and the flycheck entry point to understand how one workspace command is configured. Done means supporting separate clippy and cargo doc checks with independent command options, or documenting a decided alternative.