Despite the large diffs (caused by adopting swift-format), the actual changes are small:
* Change default of useAccessLevelOnImports to always be false by @gjcairo in https://github.com/apple/swift-protobuf/pull/1711
* Silence a warning when using Xcode 16/Swift6 toolchain. by @thomasvl in https://github.com/apple/swift-protobuf/pull/1717
What's Changed

Make README clearer about serializedBytes() by @gjcairo in Make README clearer about serializedBytes() apple/swift-protobuf#1710
Add CompileTests for InternalImportsByDefault by @gjcairo in Add CompileTests for InternalImportsByDefault apple/swift-protobuf#1709
Change default of useAccessLevelOnImports to always be false by @gjcairo in Change default of useAccessLevelOnImports to always be false apple/swift-protobuf#1711
Set up for swift-format by @thomasvl in Set up for swift-format apple/swift-protobuf#1712
Add a blame ignore for the formatting. by @thomasvl in Add a blame ignore for the formatting. apple/swift-protobuf#1713
Update proto files from upstream by @thomasvl in Update proto files from upstream apple/swift-protobuf#1714
Silence a warning when using Xcode 16/Swift6 toolchain. by @thomasvl in Silence a warning when using Xcode 16/Swift6 toolchain. apple/swift-protobuf#1717
Add Swift 6 toolchains to CI. by @thomasvl in Add Swift 6 toolchains to CI. apple/swift-protobuf#1718
Drop docc dep. by @thomasvl in Drop docc dep. apple/swift-protobuf#1720
[docs] Fix typo for Xcode that is consistent with others at PLUGIN.md. by @lamtrinhdev in [docs] Fix typo for Xcode that is consistent with others at PLUGIN.md. apple/swift-protobuf#1722
Some swift-format lint fixes by @thomasvl in Some swift-format lint fixes apple/swift-protobuf#1721
Add two more formatting fixes to the blame ignore. by @thomasvl in Add two more formatting fixes to the blame ignore. apple/swift-protobuf#1723
Allow block comments for the table in the code. by @thomasvl in Allow block comments for the table in the code. apple/swift-protobuf#1724
Resolve some more swift-format lint issues. by @thomasvl in Resolve some more swift-format lint issues. apple/swift-protobuf#1725
Update proto files from upstream. by @thomasvl in Update proto files from upstream. apple/swift-protobuf#1726
Move the 6.0 workflows to 6.0.1. by @thomasvl in Move the 6.0 workflows to 6.0.1. apple/swift-protobuf#1727
Version bump for a release. by @thomasvl in Version bump for a release. apple/swift-protobuf#1728

Full Changelog: apple/swift-protobuf@1.28.1...1.28.2