Parser polish and trimming

[noahgibbs]

The parser is some of the oldest code in SkotOS. It hardcodes a number of verbs of various types in several different lower-level-than-Merry locations, generally because that code predates Merry.

• The places where that's correct behaviour (e.g. chatmode hardcodes the "say" verb) should be documented.
• The places where the verbs are outdated (e.g. the ancient study-and-learning skills verbs) should be removed.
• Where the verbs are useful and easily moved, they should be moved to Merry
• Where the verbs are useful and not easily moved, an issue should be filed
• In all of these cases, tests should be written -- not for every verb, but at least for every type of verb

I should catalog what verbs are currently available in core SkotOS, with particular focus on verbs available to non-staff-members.

Verbs that are irrelevant to RWOT should be removed, made optional or otherwise kept from being an attractive nuisance.

Est: 3-4 days. This is hard to be sure of - how much do we want to do? 4 days wouldn't give us every verb sorted and tested, but could probably get us vRWOT-ready with a list of other work and every verb type tested.