qmllint: clean up linting categories

qmllint seems to use the wrong settings names for it categories, most notably because of copy-paste errors:

• unresolved alias uses PropertyAliasCycles from alias cycle category
• recursion depth errors uses ImportFailure from import category (btw it has the wrong description too?!)

          QQmlJS::LoggerCategory{
                  qmlImport.name().toString(), QStringLiteral("ImportFailure"),
                  QStringLiteral("Warn about failing imports and deprecated qmltypes"),
                  QtWarningMsg },
          QQmlJS::LoggerCategory{
                  qmlRecursionDepthErrors.name().toString(), QStringLiteral("ImportFailure"),
                  QStringLiteral("Warn about failing imports and deprecated qmltypes"), QtWarningMsg, false, true },
  

• top level component has a typo in its description
• missing enum entry is not registered in qmllint