* Improve ArrayList & co documentation
- Added doc comments about the validity of references to elements in
an ArrayList and how they may become invalid after resizing operations.
- This should help users avoid footguns in future.
* Improve ArrayListUnmanaged & co's documentation
- Port improved documentation from ArrayList and ArrayList aligned to
their unmanaged counterparts.
- Made documentation for ArrayListUnmanaged & co more inclusive and
up-to-date.
- Made documentation more consistent with `ArrayList`.
* Corrections on ArrayList documentation.
- Remove incorrect/unpreferred wording on ArrayList vs
ArrayListUnmanaged.
- Fix notes about the alignment of ArrayListAligned
- Be more verbose with warnings on when pointers are invalidated.
- Copy+paste a few warnings
* add warning to replaceRange
* revert changes to append documentation