Take item actions and the command list from the MOO

[ctoth]

What changes

Item cards. The card offered Get, Drop, Wear and Remove from strings written into the client. The MOO now sends, on every Char.Items item, the verbs the player can use on it (verbs), and the card shows one button per verb.

• A verb that takes only the item (take #5) is sent on click.
• A verb that needs more text (put … in chest) fills the command input, with the cursor in the gap, and is not sent.
• An item with no verbs gets no buttons. There is no built-in fallback.

Command list. The MOO now answers dns-com-awns-rehash-getcommands (it used to drop the request). The client stored every abbreviation of a command (r, re, rea, read) as its own command; it now stores the full name. Prefix completion already covers the abbreviations.

Things you will notice

• The g/w/r/d access keys on the old four buttons are gone, since the buttons are no longer fixed.
• Buttons are listed for verbs that may not apply right now (Drop on something on the floor). The MOO has no per-verb "applies now" test; using one gives the MOO's usual refusal.
• An item can have many buttons (a table in the Parlor has 18). They wrap.
• The command list is long (949 names for a guest) and includes every name the parser would accept.

MOO side (already live)

$interface_utils:all_verbs_for / visible_commands, Char.Items item_for, and handle_getcommands on the rehash package. Wire format is in docs/GMCP/mongoose-additions.md.

Tested

• npm test: 130 files, 1527 tests pass. npm run typecheck clean.
• Against the live MOO as a guest, from this branch's dev server: 7 room items arrived with verbs; the coffee table's card showed 18 actions; "Put … on" filled the input with put on #4665, cursor at 4; the command list held 949 names, with look and without l/lo.