pr: add feedback ingest command and docs #32

Job	Run time
build (aarch64-unknown-linux-gnu, ubuntu-latest)	4m 15s
build (aarch64-apple-darwin, macos-latest)	4m 31s
build (x86_64-unknown-linux-gnu, ubuntu-latest)	3m 40s
build (x86_64-apple-darwin, macos-latest)	4m 31s
release	9s
	17m 6s

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