Rewrrte and extension of #12828, with additional work for JRuby. Partially fixes#1198 by adding support for custom options. Handling of extensions will be handled in a follow up.
Also includes these unrelated fixes:
* Removes code echo between `google/protobuf/repeated_field.rb` and `google/protobuf/ffi/repeated_field.rb` by `require`'ing the former in the latter.
* Adds missing calles to `testFrozen()` from methods of `RepeatedField` under JRuby that mutate.
* Various typos in comments.
Closes#14594
COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/14594 from protocolbuffers:add-support-for-options-in-ruby 16cc9e35b8
PiperOrigin-RevId: 580848874
This makes third_party/utf8_range no longer a Git subtree, but instead the
permanent location and source of truth for utf8_range. It is also now
incorporated into the @com_google_protobuf Bazel repo. Utf8_range still has its
own separate CMake build for now, though.
PiperOrigin-RevId: 580682733
This change moves almost everything in the `upb/` directory up one level, so
that for example `upb/upb/generated_code_support.h` becomes just
`upb/generated_code_support.h`. The only exceptions I made to this were that I
left `upb/cmake` and `upb/BUILD` where they are, mostly because that avoids
conflict with other files and the current locations seem reasonable for now.
The `python/` directory is a little bit of a challenge because we had to merge
the existing directory there with `upb/python/`. I made `upb/python/BUILD` into
the BUILD file for the merged directory, and it effectively loads the contents
of the other BUILD file via `python/build_targets.bzl`, but I plan to clean
this up soon.
PiperOrigin-RevId: 568651768