[doc] core libfuncs - `bitwise` , `bool` related libfuncs, `box_forward_snapshot`, `branch_align` and bytes31 related libfuncs

[TAdev0]

Parent Task: #68

This issue will include :

    "bitwise",
    "bool_and_impl",
    "bool_not_impl",
    "bool_or_impl",
    "bool_to_felt252",
    "bool_xor_impl",
    "box_forward_snapshot",
    "branch_align",
    "bytes31_const",
    "bytes31_to_felt252",
    "bytes31_try_from_felt252",

[TAdev0]

@mazurroman you can assign me to this issue

[TAdev0]

https://docs.google.com/document/d/1EIkup1V1dmQo0A0WCORjA-kITejaIwTodLWYe1Ih77k/edit