Explore gix APIs, experiment with gix-blame API #5366

Job	Run time
test	10m 41s
pure-rust-build	2m 1s
test-32bit	5m 41s
lint	3m 49s
cargo-deny	26s
cargo-deny-advisories	26s
test-32bit-cross (armv7-linux-androideabi)	1m 11s
test-fixtures-windows	14m 39s
check-blocking	3s
check-packetline (ubuntu-latest)	5s
test-fast (windows-latest)	14m 55s
test-fast (macos-latest)	3m 49s
test-journey	3m 46s
WebAssembly (wasm32-unknown-unknown)	1m 2s
test-fast (ubuntu-latest)	3m 39s
WebAssembly (wasm32-wasi)	35s
Tests pass	1s
	1h 6m 49s

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