Implementing anima/wyrd properly.

[MistakeNot4892]

Changes for upstream

• Makes ChangeArea() a proc on /turf to reflect ChangeTurf().
• Removes the default assumption of the initial target of an ability click being the atom turf.
• Minor proc name and targeting decl changes to ability system.
• Makes fireballs an above-lighting emissive.

Changes for Pyrelight

• Renames the decls/spells/etc to properly reflect the current lore.
  • Anima is specifically the ambient Power That Be related to areas/turfs/practitioners as a kind of passive aura.
  • Potentia is the refined form of energy used to craft runestones (and later, to power Novu Uso spellcasting).
  • Wyrd is the overarching idea of magic and spellcasting (spells being wyrd workings).
• Implements basic abilities for interacting with anima and casting spells.
• Adds procs/tracking for anima levels on area, turf and mob.

TODO

• Determine why Flare/Gloom are not invocable at range.
• Determine why self-clicking doesn't work.
• Add placeholder icons and sound effects to spells.