Explore gix APIs, experiment with gix-blame API #4799

Job	Run time
pure-rust-build	1m 57s
test	13m 35s
cargo-deny (advisories)	30s
check-packetline (ubuntu-latest)	4s
cargo-deny (bans licenses sources)	28s
lint	1m 14s
test-32bit (armv7-linux-androideabi)	1m 7s
WebAssembly (wasm32-unknown-unknown)	41s
test-fast (windows-latest)	4m 33s
WebAssembly (wasm32-wasi)	1m 4s
test-fast (macos-latest)	4m 33s
test-fast (ubuntu-latest)	4m 40s
Tests pass	1s
	34m 27s

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