chore: Move Player ghosting functionality to GhostComponent (#1413)

* Moving and organizing Player code

- Move code to CharacterComponent
- Remove extraneous interfaces
- Simplify some code greatly
- Change some types to return and take in const ref (only structs larger than 8 bytes benefit from this change.)
- Update code to use CharacterComponent for sending to zone instead of Player*.

* Moving and organizing Player code

- Move code to CharacterComponent
- Remove extraneous interfaces
- Simplify some code greatly
- Change some types to return and take in const ref (only structs larger than 8 bytes benefit from this change.)
- Update code to use CharacterComponent for sending to zone instead of Player*.
- Remove static storage container (static containers can be destroyed before exit/terminate handler executes)

* remove player cast

* Remove extra includes

* Add a player manager

Used for the static Player functions.  Further removes stuff from the Player class/file.

* chore: Move ghosting functionality to component

Tested that ghosting still works and players are still firing off the OnPlayerLeave and relevant handlers.

* move to unordered_set

dGame/dComponents/GhostComponent.cpp

@@ -1,4 +1,57 @@
 #include "GhostComponent.h"
 
-// TODO Move ghosting related code from Player to here
-GhostComponent::GhostComponent(Entity* parent) : Component(parent) {}
+GhostComponent::GhostComponent(Entity* parent) : Component(parent) {
+	m_GhostReferencePoint = NiPoint3::ZERO;
+	m_GhostOverridePoint = NiPoint3::ZERO;
+	m_GhostOverride = false;
+}
+
+GhostComponent::~GhostComponent() {
+	for (auto& observedEntity : m_ObservedEntities) {
+		if (observedEntity == 0) continue;
+
+		auto* entity = Game::entityManager->GetGhostCandidate(observedEntity);
+		if (!entity) continue;
+
+		entity->SetObservers(entity->GetObservers() - 1);
+	}
+}
+
+void GhostComponent::SetGhostReferencePoint(const NiPoint3& value) {
+	m_GhostReferencePoint = value;
+}
+
+void GhostComponent::SetGhostOverridePoint(const NiPoint3& value) {
+	m_GhostOverridePoint = value;
+}
+
+void GhostComponent::AddLimboConstruction(LWOOBJID objectId) {
+	m_LimboConstructions.insert(objectId);
+}
+
+void GhostComponent::RemoveLimboConstruction(LWOOBJID objectId) {
+	m_LimboConstructions.erase(objectId);
+}
+
+void GhostComponent::ConstructLimboEntities() {
+	for (const auto& objectId : m_LimboConstructions) {
+		auto* entity = Game::entityManager->GetEntity(objectId);
+		if (!entity) continue;
+
+		Game::entityManager->ConstructEntity(entity, m_Parent->GetSystemAddress());
+	}
+
+	m_LimboConstructions.clear();
+}
+
+void GhostComponent::ObserveEntity(int32_t id) {
+	m_ObservedEntities.insert(id);
+}
+
+bool GhostComponent::IsObserved(int32_t id) {
+	return m_ObservedEntities.contains(id);
+}
+
+void GhostComponent::GhostEntity(int32_t id) {
+	m_ObservedEntities.erase(id);
+}