[2/3] update openapi spec: generate code

This updates the openapi spec and invokes the code generator to update
to the Jellyfin 10.10.6 API.

A big motivation to do this was because some mandatory fields have been
made obsolete and are no longer included in responses. Sailfin tries to
deserialize these mandatory fields and fails deserializing. It was evident
in the list of sessions to control.

The failing was a bit too gracefully in my opinion, it did not even show
that an error occurred, nor was it logged anywhere. It took some time
to debug.

core/include/JellyfinQt/dto/pathsubstitution.h

@@ -46,7 +46,12 @@ namespace DTO {
 
 
 class PathSubstitution {
-public:	PathSubstitution();
+public:
+	PathSubstitution(	
+		QString from,			
+		QString to		
+	);
+
 	PathSubstitution(const PathSubstitution &other);
 	
 	/**
@@ -67,8 +72,6 @@ public:	PathSubstitution();
 	* @brief Gets or sets the value to substitute.
 	*/
 	void setFrom(QString newFrom);
-	bool fromNull() const;
-	void setFromNull();
 
 	/**
 	 * @brief Gets or sets the value to substitution with.
@@ -78,15 +81,15 @@ public:	PathSubstitution();
 	* @brief Gets or sets the value to substitution with.
 	*/
 	void setTo(QString newTo);
-	bool toNull() const;
-	void setToNull();
 
 
 protected:
 	QString m_from;
 	QString m_to;
 
-
+private:
+	// Private constructor which generates an invalid object, for use withing PathSubstitution::fromJson();
+	PathSubstitution();
 };