Coding - Refactor switch-case statements and improve memory management #569

- Added missing break statements in switch-case blocks in LDOMBasicString, LDOM_BasicElement, PCDM_ReadWriter, and IntCurve_IntConicConic_1 to prevent fall-through behavior.
- Enhanced Standard_Macro.hxx to support fallthrough attributes across different compilers.
- Corrected the use of std::forward in Standard_MemoryUtils.hxx for better type deduction.
- Replaced raw arrays with NCollection_Array1 in AdvApp2Var_SysBase for improved memory safety.
- Updated Extrema_ExtCC2d to utilize smart pointers for better memory management and avoid potential leaks.
- Refactored Units_UnitsDictionary to use NCollection_Array2 for matrix representation, improving readability and maintainability.
- Initialized TranFirst and TranLast in TopTrans_CurveTransition constructor for better default state management.
- Set myStatus in ShapeConstruct_ProjectCurveOnSurface constructor to ensure proper initialization.
- Changed matrix access in Units_UnitsDictionary to use NCollection_Array2 syntax for consistency.

src/ModelingAlgorithms/TKGeomAlgo/IntCurve/IntCurve_IntConicConic_1.cxx

@@ -2068,6 +2068,7 @@ void IntCurve_IntConicConic::Perform(const gp_Lin2d&        L1,
                 ParamEnd2 = ParamEnd - Org2SurL1;
               }
             }
+            break;
           default: //~~~ Segment Infini a droite
             break;
         }

src/ModelingAlgorithms/TKGeomAlgo/IntPatch/IntPatch_ImpPrmIntersection.cxx

@@ -486,6 +486,7 @@ void Recadre(const Standard_Boolean,
         U1 += M_PI + M_PI;
       while (U1 > (U1p + 1.5 * M_PI))
         U1 -= M_PI + M_PI;
+      break;
     default:
       break;
   }
@@ -504,6 +505,7 @@ void Recadre(const Standard_Boolean,
         U2 += M_PI + M_PI;
       while (U2 > (U2p + 1.5 * M_PI))
         U2 -= M_PI + M_PI;
+      break;
     default:
       break;
   }

src/ModelingAlgorithms/TKGeomAlgo/TopTrans/TopTrans_CurveTransition.cxx

@@ -32,6 +32,8 @@ TopTrans_CurveTransition::TopTrans_CurveTransition()
       CurvFirst(0.0),
       CurvLast(0.0)
 {
+  TranFirst = TopAbs_FORWARD;
+  TranLast  = TopAbs_FORWARD;
 }
 
 //=======================================================================

src/ModelingAlgorithms/TKShHealing/ShapeConstruct/ShapeConstruct_ProjectCurveOnSurface.cxx

@@ -108,6 +108,7 @@ ShapeConstruct_ProjectCurveOnSurface::ShapeConstruct_ProjectCurveOnSurface()
   myBuild           = Standard_False;
   myAdjustOverDegen = 1; //: c0 //szv#4:S4163:12Mar99 was boolean
   myNbCashe         = 0; //: q9
+  myStatus          = ShapeExtend::EncodeStatus(ShapeExtend_OK);
 }
 
 //=================================================================================================