feat: color-code ENERGIZE combat text by power type

Mana (0)=blue, Rage (1)=red, Focus (2)=orange, Energy (3)=yellow,
Runic Power (6)=teal. Previously all energize events showed as blue
regardless of resource type, making it impossible to distinguish
e.g. a Warrior's Rage generation from a Mage's Mana return.

Power type is now captured from SMSG_SPELLENERGIZELOG (uint8) and
SMSG_PERIODICAURALOG OBS_MOD_POWER/PERIODIC_ENERGIZE (uint32 cast
to uint8) and stored in CombatTextEntry::powerType.

include/game/spell_defines.hpp

@@ -59,6 +59,7 @@ struct CombatTextEntry {
     uint32_t spellId = 0;
     float age = 0.0f;           // Seconds since creation (for fadeout)
     bool isPlayerSource = false; // True if player dealt this
+    uint8_t powerType = 0;      // For ENERGIZE: 0=mana,1=rage,2=focus,3=energy,6=runicpower
 
     static constexpr float LIFETIME = 2.5f;
     bool isExpired() const { return age >= LIFETIME; }