This PR defines `reverse` for bitvectors and implements a first subset
of theorems (`getLsbD_reverse, getMsbD_reverse, reverse_append,
reverse_replicate, reverse_cast, msb_reverse`). We also include some
necessary related theorems (`cons_append, cons_append_append,
append_assoc, replicate_append_self, replicate_succ'`) and deprecate
theorems`replicate_zero_eq` and `replicate_succ_eq`.
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Co-authored-by: Alex Keizer <alex@keizer.dev>
Co-authored-by: Kim Morrison <kim@tqft.net>
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