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/minecraft/LaunchProfile.cpp

@@ -126,6 +126,11 @@ void LaunchProfile::applyMods(const QList<LibraryPtr>& mods)
     }
 }
 
+void LaunchProfile::applyCompatibleJavaMajors(QList<int>& javaMajor)
+{
+    m_compatibleJavaMajors.append(javaMajor);
+}
+
 void LaunchProfile::applyLibrary(LibraryPtr library)
 {
     if(!library->isActive())
@@ -275,6 +280,11 @@ const QList<LibraryPtr> & LaunchProfile::getMavenFiles() const
     return m_mavenFiles;
 }
 
+const QList<int> & LaunchProfile::getCompatibleJavaMajors() const
+{
+    return m_compatibleJavaMajors;
+}
+
 void LaunchProfile::getLibraryFiles(
     const QString& architecture,
     QStringList& jars,