feat: Add Repository::drop_index and ::drop_data_from_index

[aawsome]

Adds the methods drop_index and drop_data_from_index to Repository. This can be handy to save memory if the index is no longer needed.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 19.35484% with 25 lines in your changes missing coverage. Please review.

Project coverage is 48.0%. Comparing base (483e777) to head (4d6c800). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/core/src/repository.rs	25.0%	18 Missing :warning:
crates/core/src/index/binarysorted.rs	0.0%	5 Missing :warning:
crates/core/src/index.rs	0.0%	2 Missing :warning:

Additional details and impacted files

Files with missing lines	Coverage Δ
crates/core/tests/integration.rs	76.9% <ø> (-3.9%)	:arrow_down:
crates/core/src/index.rs	59.1% <0.0%> (-4.7%)	:arrow_down:
crates/core/src/index/binarysorted.rs	82.6% <0.0%> (-4.3%)	:arrow_down:
crates/core/src/repository.rs	47.6% <25.0%> (-1.6%)	:arrow_down:

... and 17 files with indirect coverage changes