Tracking issue for planned breaking changes:

[sosthene-nitrokey]

• [x] Rework re-exports in lib.rs https://github.com/rust-embedded/heapless/pull/490#issuecomment-2200015830
• [x] Rename Deque::storage_len to len: https://github.com/rust-embedded/heapless/pull/490#issue-2383361459
• [ ] Remove the Storage generic on history_buf::OldestOrdered. The view version can become the version that is always used: https://github.com/rust-embedded/heapless/pull/570
• [x] Queue::capacity and Queue::storage_capacity should be changed
• [ ] spsc: The iterators, consumers and producers should be made to only have the View variants: https://github.com/rust-embedded/heapless/pull/571
• [x] SortedLinkLinst: Iter and FindMut should be made to only exist in the View version: https://github.com/rust-embedded/heapless/pull/540
• [x] Vec: rename storage_capacity to capacity and remove the const version https://github.com/rust-embedded/heapless/pull/538
• [x] SortedLinkedList removing unit error type: #532
• [x] Vec and String removing unit error type: #533