Sneak and rogue skills

New commands:

hide - Pass the skill throw (and be alone in the location), to hide and become impossible to spot. Costs on action point. unhide - Reveal yourself again. search_hidden - Search for npcs that are hidden. Costs on action point. pick_lock - Use your skills to pick doors that are locked (maybe mostly interesting in Dungeon stories).

Relevant spells: cast_rejuvenate - Replenish action points. cast_hide - Hide someone (maybe yourself). cast_reveal - Use magic to reveal someone hiding. For all spells the format i: spell who (level optional)

When you're hidden, no replenishment is possible. Attacking will reveal yourself. Autonomous npcs may search and hide. For others I'm thinking about adding a perception based 'throw'.

Being hidden may be janky in some situations. Both because I've missed to take some things into consideration, and in the case of LLM powered NPC's, their reaction to a "[hidden]" tag may vary, if you choose to interact with them.