🤖Neo Angband: Borg v1.0.0

Fixed

• Regional fear from an unseen spellcaster was not ported (neo-angband#38). Upstream’s borg_fear_spell and the monster-spell message table it keys off raised regional fear from a spellcaster the Borg cannot see, the same way an unseen biter already did; the spell side of that table did not exist in the port, so an invisible caster raised no fear at all. The spell-message table is ported and wired the same way the existing blow-message table already was.
• The detection scheduler (borg_check_light) was not ported (neo-angband#40). Upstream casts Find Traps/Doors/Stairs, Detect Evil, Magic Mapping and Detect Objects on a cadence and tracks per-panel which parts of a level have been swept, so a caster benefits from its own detection spells the way a warrior cannot. The port had no panel concept to hang that bookkeeping on; a 3x3 panel grid and the scheduler are both added.