feat: add `BitVec.[(getMsbD, msb)_extractLsb', (getLsbD, getMsbD, msb)_extractLsb] `, add `and_eq_decide, or_eq_decide, decide_eq_true_iff` to `bool_to_prop ` (#6792) This PR adds theorems `BitVec.(getMsbD, msb)_(extractLsb', extractLsb), getMsbD_extractLsb'_eq_getLsbD`. --------- Co-authored-by: Siddharth <siddu.druid@gmail.com> Co-authored-by: Alex Keizer <alex@keizer.dev> Co-authored-by: Kim Morrison <kim@tqft.net> Co-authored-by: Tobias Grosser <tobias@grosser.es> Co-authored-by: Tobias Grosser <github@grosser.es>
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