Create new alternate jackson-jakarta-rs-providers repo for Jakarta (not Javax) RS implementation

[cowtowncoder]

Due to Cluster*uck knowns as "Javax to Jakarta migration" (renaming/repackaging of former javax things like jaxb and jaxrs due to Oracles' Lawyering Bullshit), it seems necessary to basically fork this package.
Attempt with 2.12 to use classifier, post-processing, seems to produce its own problems (esp. due to dependency to JAXB/Jakarta-Binding annotations), unfortunately. So instead let's:

• Leave this repo for "old" Javax JAX-RS implementation, dependencies
• Create new repo (jackson-jakarta-rs-providers) for new Jakarta JAX-RS variant, with appropriate dependencies, no classifier

For Jackson 3.0 this probably means that we won't bother with old repo and only publish new one.

[cowtowncoder]

cc @GedMarc -- thinking of tackling this next. I already have created https://github.com/FasterXML/jackson-modules-base/tree/master/jakarta-xmlbind for JAXB->Jakarta-Binding (and for 2.13, jackson-dataformat-xml has no dependency to either), so doing this should remove the need for classifier variants.

[cowtowncoder]

Created:

https://github.com/FasterXML/jackson-jakarta-rs-providers

and both 2.13 and master (3.0) build, pass tests and have been published as snapshots as well.

Also created an issue to track validation before (ideally) 2.13 Release Candidates:

FasterXML/jackson-jakarta-rs-providers#1