[FR]: Gazelle: Generate different types of targets for tests vs sources

[mrmeku]

What is the current behavior?

Right now both tests and source targets are generated as ts_projects. This is fine in principle as a default, but disallows me to generate a different kind of target for my tests since both have the same kind so gazelle's map_kind directive applies to both tests and source targets.

Describe the feature

Tests target should have a different kind (in gazelle terms) than source targets. If this were the case, I could independently configure the kind of my source files to be my own fe_library rule and have my tests be my own my_special_test rule.

[Aghassi]

My company would benefit from support for this. We currently have patched the gazelle plugin to enable this internally

[Aghassi]

Just to follow up here, the additional benefit to this would be allowing more than one test target type so we could have macros for say jest, playwright, or other testing frameworks