Prepare for the Guice 6.0 & 7.0 releases. This change does the following:
Bumps the snapshot version to 7.0.1-SNAPSHOT
Adds Guice 6 & Guice 7 release pages, with explanations of the jakarta transition & how Guice 6.0 & 7.0 should be used. They also include changelogs since 5.1.0.
Updates the top-level README to reference the 6.0 & 7.0 releases, as well as including "installation instructions" (which fixes #1698).
Updates the wiki to make sure it's meaningful for both javax & jakarta references, pointing to the correct ones where appropriate.
Prepare for the Guice 6.0 & 7.0 releases. This change does the following: