fix(fossid-webapp): Add missing license category

This new category is "Source-available Non-commercial": the license does
not fulfill the Open Source Definition and contains clauses explicitly
limiting the licensed material from being used commercially.

Signed-off-by: Nicolas Nobelis <nicolas.nobelis@bosch.com>

Author: nnobelis

clients/fossid-webapp/src/main/kotlin/model/result/LicenseCategory.kt

@@ -19,12 +19,17 @@
 
 package org.ossreviewtoolkit.clients.fossid.model.result
 
+/**
+ * The category of a license in the FossId Knowledge Base. The list of license categories is visible at:
+ * https://<FossID server>/help/en/web-application/license_categories.html.
+ */
 enum class LicenseCategory {
     COMMERCIAL,
     NON_COMMERCIAL,
     NON_LICENSE,
     PERMISSIVE,
     SOURCE_AVAILABLE,
+    SOURCE_AVAILABLE_NC,
     STRONG_COPYLEFT,
     UNCATEGORIZED,
     WEAK_COPYLEFT