feat: add `CacheReader` for SStable #874

Job	Run time
Rust benchmark	1s
Rust project check (ubuntu-latest)	6m 26s
Rust exmaples	9m 56s
Rust project check (macos-latest)	4m 58s
Rust fmt	24s
Rust project check (windows-latest)	11m 53s
	33m 38s

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