refactor: move searching commit code from `Repository` to `SearchComm… #3967

Job	Run time
Prepare version string	6s
Build / Build Linux	3m 34s
Build / Build Linux (arm64)	3m 31s
Build / Build macOS (Apple Silicon)	3m 6s
Build / Build Windows x64	3m 52s
Build / Build Windows ARM64	4m 28s
Build / Build macOS (Intel)	6m 49s
Package / Package macOS (osx-arm64)	21s
Package / Package macOS (osx-x64)	19s
Package / Package Windows (win-arm64)	23s
Package / Package Windows (win-x64)	35s
Package / Package Linux (linux-arm64)	1m 7s
Package / Package Linux (linux-x64)	56s
	29m 7s

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