The minimum Java version for building with Ant is 25, to support ErrorProne.
Add section on the Ant format task.
Fix minimum Java requirements to 17 (SolarNode) and 25 (SolarNet).
Fix typo.
Update minimum Java to 21.
Add link to OSGi.
Work on dev guides.
Update SolarNet build guides for 2.x.
Tweak case.
Add info on publishing to Maven Central.
Add note re Git LFS requirement.
Add info in unit testing.
Fix minimum Java version.
Fix header so it doesn't match the main header.
Work on developer wiki pages.