feat(ui): add CGPartyInfo::NumMembers

src/ui/game/CGPartyInfo.cpp

@@ -0,0 +1,15 @@
+#include "ui/game/CGPartyInfo.hpp"
+
+WOWGUID CGPartyInfo::m_members[4];
+
+uint32_t CGPartyInfo::NumMembers() {
+    uint32_t count = 0;
+
+    for (auto& member : CGPartyInfo::m_members) {
+        if (member != 0) {
+            count++;
+        }
+    }
+
+    return count;
+}

src/ui/game/CGPartyInfo.hpp

@@ -0,0 +1,16 @@
+#ifndef UI_GAME_C_G_PARTY_INFO_HPP
+#define UI_GAME_C_G_PARTY_INFO_HPP
+
+#include "util/GUID.hpp"
+
+class CGPartyInfo {
+    public:
+        // Public static functions
+        static uint32_t NumMembers();
+
+    private:
+        // Private static variables
+        static WOWGUID m_members[];
+};
+
+#endif