This commit adds a standard GHA workflow to perform a release, including
syncing with Maven Central using s01.oss.sonatype.org.
The release workflow kicks off based on tag that matches `vX.Y.Z` and
perform the following:
* Build the project
* Stage the bits to repo.spring.io
* Move the staging bits to Maven Central
* Promote the bits to repo.spring.io/release
* Generate a changelog using the issues matching the version
Closes gh-1812