21612 Separate mutators for text and selection (affects: desktop, affects: text input, cla: yes, platform-linux, platform-windows, waiting for tree to go green)

21699 [macOS] Fix docs for loadAOTData and minor refactor (affects: desktop, cla: yes, needs tests, platform-macos)

21789 [macOS] Add plumbing to grab dart entrypoint args (affects: desktop, cla: yes, needs tests, platform-macos, waiting for tree to go green)

21811 Switch macOS embedding to proc table embedder API (affects: desktop, affects: engine, cla: yes, platform-macos)

21897 Add multi-step input method support for Linux (affects: desktop, affects: text input, cla: yes, needs tests, platform-linux)