feat: support for yarn protocol `jsr:`

[jkowalleck]

Is your feature request related to a problem? Please describe.

since yarn 4.9.0 they have native support for protocol jsr. see https://github.com/yarnpkg/berry/releases/tag/%40yarnpkg/cli/4.9.0

lets add support for it!

Describe the solution you'd like

JSR packages have the download location have the "correct" (whatever this means) properties:

• download location is on JSR
• PackageURL uses jsr for type -- see Add new PURL type: 'jsr' package-url/purl-spec#457

test bed should be a new one called jsr-protocol-dependency!

Describe alternatives you've considered

/

Additional context

• see related test bed: https://github.com/CycloneDX/cyclonedx-node-yarn/tree/main/tests/_data/testbeds/alternative-package-registry
• purl type requested - Add new PURL type: 'jsr' package-url/purl-spec#457

Contribution

• I am willing to provide an implementation
• I will wait until somebody else implements it

[jkowalleck]

a kickstart was made, by adding test beds and initial test snapshots: #293
the PR might be abandoned, feel free to continue