Support profile OTA update for Orca Slicer (#4069)

profile ota support

src/libslic3r/AppConfig.hpp

@@ -249,6 +249,9 @@ public:
 	// This returns a hardcoded string unless it is overriden by "version_check_url" in the ini file.
 	std::string 		version_check_url(bool stable_only = false) const;
 
+	// Get the Orca profile update url.
+	std::string 		profile_update_url() const;
+
 	// Returns the original Slic3r version found in the ini file before it was overwritten
 	// by the current version
 	Semver 				orig_version() const { return m_orig_version; }