feat: block launch if Java is incompatible

Keep track of compatible Java versions from meta. Launch-step
VerifyJavaInstall will check if current instance's Java version is
compatible.
Also add override option both globally and per-instance in-case the user
doesn't care about the requirement.

launcher/Application.cpp

@@ -682,6 +682,7 @@ Application::Application(int &argc, char **argv) : QApplication(argc, argv)
         m_settings->registerSetting("JavaVendor", "");
         m_settings->registerSetting("LastHostname", "");
         m_settings->registerSetting("JvmArgs", "");
+        m_settings->registerSetting("IgnoreJavaCompatibility", false);
 
         // Native library workarounds
         m_settings->registerSetting("UseNativeOpenAL", false);