[ALICE3]: Add FD3 hit (#16118)

Author: njacazio

DataFormats/Detectors/Common/include/DetectorsCommonDataFormats/SimTraits.h

@@ -100,7 +100,7 @@ class SimTraits
       /*RCH*/ VS{ "RCHHit" },
       /*MI3*/ VS{ "MI3Hit" },
       /*ECL*/ VS{ "ECLHit" },
-      /*FD */ VS{ "FDHit" }
+      /*FD3*/ VS{ "FD3Hit" }
 #endif
     };
   // clang-format on
@@ -176,6 +176,10 @@ namespace focal
 {
 class Hit;
 }
+namespace fd3
+{
+class Hit;
+}
 namespace detectors
 {
 
@@ -260,6 +264,10 @@ template <>
 struct DetIDToHitTypes<o2::detectors::DetID::FCT> {
   using HitType = o2::itsmft::Hit;
 };
+template <>
+struct DetIDToHitTypes<o2::detectors::DetID::FD3> {
+  using HitType = o2::fd3::Hit;
+};
 #endif
 
 } // namespace detectors

DataFormats/Detectors/Common/src/DetID.cxx

@@ -34,6 +34,7 @@ constexpr DetID::ID DetID::IT3;
 constexpr DetID::ID DetID::TRK;
 constexpr DetID::ID DetID::FT3;
 constexpr DetID::ID DetID::FCT;
+constexpr DetID::ID DetID::FD3;
 #endif
 
 constexpr int DetID::nDetectors;