Proof of proveit.physics.quantum.algebra.ket_one_in_qubit_space theorem

import proveit
theory = proveit.Theory() # the theorem's theory

%proving ket_one_in_qubit_space

With these allowed/disallowed theorem/theory presumptions (e.g., to avoid circular dependencies), we begin our proof of
ket_one_in_qubit_space:
(see dependencies)