[#822] Refactor (out) annotation support

Description

Problem: Jakarta mostly ignores annotations on instructions. We'd like to do the same to simplify our code. However, while we don't want to do much with the annotations, we still need to carry those around because they affect PACK.

Solution: Carry annotations inside typed instructions directly. Create pattern synonyms which ignore annotations to reduce friction. Do not use Notes in HST, use simple singletons instead.

Related issue(s)

Resolves #822 (closed)

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