feat: Implement `BINARY` (incomplete)

[coveralls]

Pull Request Test Coverage Report for Build 7902630761

Details

• -56 of 56 (0.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.5%) to 92.562%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
imap-types/src/extensions/binary.rs	0	22	0.0%
imap-codec/src/extensions/binary.rs	0	34	0.0%
<!--	Total:	0	56	0.0%	-->

Totals
Change from base Build 7871298858:	-0.5%
Covered Lines:	9558
Relevant Lines:	10326

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💛 - Coveralls