Introduce Iter::next_range and next_range_back

[Dr-Emann]

closes #274

[Copilot]

Pull Request Overview

This PR introduces new methods next_range and next_range_back to the Iter and IntoIter types for RoaringBitmap, enabling extraction of consecutive ranges of set bits from iterators rather than individual values.

• Implementation of range extraction methods across all container types (array, bitmap, run)
• Helper functions for finding contiguous ranges in array stores
• Comprehensive test coverage including edge cases and multi-container scenarios

Reviewed Changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
roaring/tests/iter_next_range.rs	Comprehensive test suite covering various scenarios for the new range methods
roaring/src/bitmap/iter.rs	Main implementation of next_range and next_range_back methods for public iterators
roaring/src/bitmap/container.rs	Container-level wrapper methods that delegate to store implementations
roaring/src/bitmap/store/mod.rs	Store iterator wrapper that dispatches to specific store implementations
roaring/src/bitmap/store/array_store/mod.rs	Helper functions for finding contiguous ranges in sorted arrays
roaring/src/bitmap/store/bitmap_store.rs	Bitmap store implementation with bit manipulation for range extraction
roaring/src/bitmap/store/interval_store.rs	Run store implementation using interval-based range extraction
fuzz/fuzz_targets/arbitrary_ops/mod.rs	Fuzz testing support for the new range methods

[Kerollmops]

Looks very good to me. Have you run the fuzzer for more than 30 minutes in the CI?

[Kerollmops]

Nice, thank you for your work, again 👌