Explore gix APIs, experiment with gix-blame API #5318

Job	Run time
test	10m 43s
pure-rust-build	1m 58s
test-fast (windows-latest)	16m 5s
test-32bit	5m 32s
test-fast (macos-latest)	3m 10s
test-fixtures-windows	13m 51s
test-journey	3m 40s
cargo-deny	27s
cargo-deny-advisories	27s
check-blocking	3s
test-fast (ubuntu-latest)	3m 37s
check-packetline (ubuntu-latest)	5s
lint	3m 52s
test-32bit-cross (armv7-linux-androideabi)	1m 8s
WebAssembly (wasm32-unknown-unknown)	1m 7s
WebAssembly (wasm32-wasi)	39s
Tests pass	1s
	1h 6m 25s

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