feat: Add read-data-subset to CheckOptions; allow to check given trees

[aawsome]

Adds Repository::check_with_trees which allows to do tree and data check only for the given trees.

Moreover, CheckOptions now have the read_data_subset option which allows to read only parts of the pack files.

closes rustic-rs/rustic#251

[codecov]

Codecov Report

Attention: Patch coverage is 69.56522% with 21 lines in your changes missing coverage. Please review.

Project coverage is 45.9%. Comparing base (c504c29) to head (a848711).

Files with missing lines	Patch %	Lines
crates/core/src/commands/check.rs	72.4%	16 Missing ⚠️
crates/core/src/id.rs	50.0%	3 Missing ⚠️
crates/core/src/repository.rs	60.0%	2 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
crates/core/src/error.rs	57.1% <ø> (ø)
crates/core/src/repository.rs	48.5% <60.0%> (+0.9%)	⬆️
crates/core/src/id.rs	45.7% <50.0%> (-2.7%)	⬇️
crates/core/src/commands/check.rs	66.8% <72.4%> (+2.4%)	⬆️

... and 20 files with indirect coverage changes