[BUILD_MGR] Added SOS and ST

[markpnoi26]

Summary

• Add SOS (Signet of Spirits) and Soul Twisting BuildMgr builds with full ChannelingMagic skill implementations (Signet of Spirits, Bloodsong, Vampirism, Summon Spirits, Gaze of Fury, Painful Bond)
• Split Soul Twisting into OOC/Combat handlers so it only maintains self-buffs while walking and reserves spirit casting for combat
• Fix spirit skill casting bug in BuildMgr where CastSpiritSkillID would cause heroes to run back and forth without ever casting — the pre-cast movement yielded before UseSkill, and SetTickSuccess() was
  placed after post-cast yields, both incompatible with the headless tree's single-step next() generator consumption
• Add SpiritBuffExists guard to Communing._cast_protective_spirit to skip re-casting spirits that are already alive nearby

Details

New builds:

• Ritualist/Rt_Any/SOS.py — Signet of Spirits offensive spirit spammer
• Ritualist/Rt_Any/Soul_Twisting.py — Soul Twisting protective spirit maintainer (OOC: self-buffs only, Combat: full rotation)

BuildMgr fixes (affects all spirit builds):

• CastSpiritSkillID: removed _move_for_spirit_cast() pre-move that yielded before the skill was used, added CanCastSkillID early-out
• CastSkillID / CastSkillSlot: moved SetTickSuccess() before spirit post-cast yields so it executes before next() returns

Skill implementations:

• ChannelingMagic: added Signet_of_Spirits, Bloodsong, Vampirism, Summon_Spirits, Gaze_of_Fury, Painful_Bond
• Communing._cast_protective_spirit: added SpiritBuffExists check