Add `gix blame --since` #5643

Job	Run time
cargo-deny	29s
cargo-deny-advisories	30s
check-blocking	4s
check-packetline (ubuntu-latest)	6s
lint	3m 45s
pure-rust-build	1m 54s
test	10m 59s
test-32bit (i386)	7m 39s
test-fast (windows-latest)	15m 56s
test-fixtures-windows	15m 18s
test-fast (macos-latest)	4m 20s
test-journey	4m 11s
test-fast (ubuntu-latest)	3m 57s
WebAssembly (wasm32-unknown-unknown)	1m 15s
test-fast (ubuntu-22.04-arm)	6m 8s
test-32bit (arm32v7)	7m 18s
WebAssembly (wasm32-wasip1)	47s
Tests pass	1s
	1h 24m 37s

Provide feedback