Is your feature request related to a problem? Please describe.
Currently checker-qual is bundled with the project. It brings a ton of classes and - as far as I can see - it's only used for @NonNull and @Nullable annotations.

Describe the solution you'd like
Replace it with something smaller like jspecify (or maybe jakarta-annotation-api)

Describe alternatives you've considered

Additional context

JAR file sizes

• jspecify: 3KB
• checker-equal: 232KB