invalidate parent paint when dash is invalidated

when dashes change, the parent stroke wasn't getting neither invalidated nor added dirt to, which would cause the path not to update correctly..
This implementation is copying how trim path invalidates its parent.

Diffs=
b8c47bea69 invalidate parent paint when dash is invalidated (#9029)

Co-authored-by: hernan <[email protected]>

.rive_head

@@ -1 +1 @@
-670e8ea231777f4f1f63164460521227f16d8068
+b8c47bea694e7d34b73470751661f721feeab14f

include/rive/shapes/paint/dash_path.hpp

@@ -19,7 +19,7 @@ class PathDasher
 
 protected:
     void invalidateSourcePath();
-    void invalidateDash();
+    virtual void invalidateDash();
     ShapePaintPath* dash(const RawPath* source,
                          Dash* offset,
                          Span<Dash*> dashes);
@@ -41,6 +41,7 @@ class DashPath : public DashPathBase, public PathDasher, public StrokeEffect
     void offsetIsPercentageChanged() override;
     void updateEffect(const ShapePaintPath* source) override;
     ShapePaintPath* effectPath() override;
+    void invalidateDash() override;
 
 private:
     std::vector<Dash*> m_dashes;

src/shapes/paint/dash_path.cpp

@@ -148,4 +148,15 @@ void DashPath::updateEffect(const ShapePaintPath* source)
     dash(source->rawPath(), &dashOffset, m_dashes);
 }
 
-ShapePaintPath* DashPath::effectPath() { return &m_path; }
+ShapePaintPath* DashPath::effectPath() { return &m_path; }
+
+void DashPath::invalidateDash()
+{
+    PathDasher::invalidateDash();
+    if (parent() != nullptr)
+    {
+        auto stroke = parent()->as<Stroke>();
+        stroke->parent()->addDirt(ComponentDirt::Paint);
+        stroke->invalidateRendering();
+    }
+}