Milestone 126

[pragmatrix]

This PR aligns rust-skia with Skia's chrome/m126 branch.

• [x] Update README.md (rendered)

  Most important here is to change the Skia branch name and the current Skia submodule tag at the top of the README.md file.

• [ ] Diff the the following files to see if the build organization has changed significantly:
  • [ ] /BUILD.gn
  • [ ] /gn/* (recursively)
  • [ ] /modules/skshaper/BUILD.gn
  • [ ] /modules/skshaper/skshaper.gni
  • [ ] /modules/paragraph/BUILD.gn
  • [ ] /modules/paragraph/skparagraph.gni
• [x] Skia builds (release notes).
• [x] /skia-bindings builds.
• [ ] /skia-safe: Update & add new wrappers by diffing include files.

  Add TODOs for everything that can not be updated right now, and attempt to stay compatible with previous versions of skia-safe without trying too hard before version 1.0. Use deprecated attributes if needed.

  • [ ] codec/
  • [ ] core/
  • [ ] docs/
  • [ ] effects/
  • [ ] encode/
  • [ ] gpu/
    • [ ] d3d/
    • [ ] ganesh/
    • [ ] gl/
    • [ ] mtl/
    • [ ] vk/
  • [ ] pathops/
  • [ ] svg/
  • [ ] utils/
  • [ ] modules/
    • [ ] paragraph/
    • [ ] shaper/
  • [ ] private/base/*
    • [ ] SkPoint_impl.h
• [ ] Review Send & Sync implementations for new wrappers.
• [ ] Review Debug implementation for new wrapper types and functions.
• [ ] Release date of the matching Chrome version in less than 7 days?
• [ ] Any pending changes in the Skia chrome/m126 branch that aren't synchronized yet?
• [ ] Rebase on or merge with master.
• [ ] Do the rust-skia: commits in the skia-bindings/skia subdirectory match with master (make diff-skia).
• [ ] Update versions of skia-bindings/Cargo.toml and skia-safe/Cargo.toml and also add the version to the new deprecated attributes.
• [ ] Do the tags/hashes in skia-bindings/Cargo.toml under [package.metadata] match the submodules depot_tools and skia?
• [ ] Review API changes: make diff-api.
• [ ] Test builds we don't do on the CI:
  • [ ] Compiles to Catalyst targets on macOS (#548).

    make macos-qa
    

• [ ] Do one final review of all the changes.
• [ ] Run make doc and fix all warnings.