fixes clang 21.1.8 warnings

[LowLevelMahn]

src/shape/types.h:16:15: warning: anonymous non-C-compatible type given name for linkage purposes by typedef declaration; add a tag name here [-Wnon-c-typedef-for-linkage]
   16 | typedef struct {
      |               ^
      |                VertexF
src/shape/types.h:21:3: note: type is not C-compatible due to this member declaration
   21 |   inline QVector3D toQ() const { return QVector3D(x, y, z); }

src/shape/shapeview.cpp:214:12: warning: unused variable 'color' [-Wunused-variable]
  214 |     QColor color;    

src/app/settings.cpp:233:7: warning: use of bitwise '|' with boolean operands [-Wbitwise-instead-of-logical]
  233 |   if (colors.empty() | patterns.empty()) {

additional not-fixed warnings:

your moveRows(QItemSelectionModel* selectionModel, int direction) overloads a virtual from the QAbstractItemModel
in

src/app/resourcesmodel.h
src/shape/shapemodel.h

creates a warnings

src/shape/shapemodel.h:54:21: warning: 'ShapeModel::moveRows' hides overloaded virtual function [-Woverloaded-virtual]
   54 |   void              moveRows(QItemSelectionModel* selectionModel, int direction);
      |                     ^
/usr/include/qt5/QtCore/qabstractitemmodel.h:223:18: note: hidden overloaded virtual function 'QAbstractItemModel::moveRows' declared here: different number of parameters (5 vs 2)
  223 |     virtual bool moveRows(const QModelIndex &sourceParent, int sourceRow, int count,

and many gnu-zero-variadic-macro-arguments warnings like this one

src/app/stunpack.h:34:64: warning: token pasting of ',' and __VA_ARGS__ is a GNU extension [-Wgnu-zero-variadic-macro-arguments]
   34 | #define STPK_VERBOSE1(msg, ...)  if (verbose > 1)  printf(msg, ## __VA_ARGS__)

but your stunpack lib seems to be better and should be used here