bump bazel to 8.4.1

Trivial readme update (#9)

Use prototext for unidiff (#8)

* update readme with serve instructions

* Use prototext for unidiff compare

* Fix test

* try no space

* use textproto ext

* use label

* disable-test

Augment report with --before and --after files (#6)

remove unused release notes bodypath

remove test step until we have some