Add push button support for OFX plugins

This commit adds support for push buttons in OFX plugins by:

- Adding `kPushButton` to `NodeValue` enum
- Implementing `pushButtonClicked` slot in `PluginNode`
- Creating `NodeParamButton` widget for UI representation
- Updating `paraminstance.h` to handle push button instances
- Modifying `nodeparamviewwidgetbridge.cpp` to connect push button signals

app/render/job/pluginjob.h

@@ -23,21 +23,20 @@
 #include "pluginSupport/OlivePluginInstance.h"
 
 #include <any>
+#include <OpenImageIO/detail/fmt/chrono.h>
 
 namespace olive {
 namespace plugin {
 
 class PluginJob :public AcceleratedJob{
 public:
-	explicit PluginJob(std::shared_ptr<OlivePluginInstance> pluginInstance, NodeValueRow row): AcceleratedJob()
+	explicit PluginJob(OFX::Host::ImageEffect::ImageEffectPlugin* pluginInstance, NodeValueRow row): AcceleratedJob()
 	{
 		this->pluginInstance = pluginInstance;
-
-
 	}
 
 private:
-	std::shared_ptr<OlivePluginInstance> pluginInstance;
+	OFX::Host::ImageEffect::ImageEffectPlugin *pluginInstance=nullptr;
 
 	QHash<OfxTime, QHash<QString, std::any>> paramsOnTime;