data: showing local symbols

- added local symbols to storage
- added tests for local symbol parsing
- added MessageActivateLocalSymbols to activate local symbols in code view
- TokenLocations now store their LocationType instead of a plain bool "isScope"
- moved LocationType from TokenLocation to separate file, since it is also used in Annotations now.
- added local_symbol in stylesheet to define a style for hovering and activating these elements
- renamed location to token in stylesheet

src/lib/data/access/StorageAccessProxy.cpp

@@ -143,6 +143,16 @@ std::vector<Id> StorageAccessProxy::getNodeIdsForLocationIds(const std::vector<I
 	return std::vector<Id>();
 }
 
+std::vector<Id> StorageAccessProxy::getLocalSymbolIdsForLocationIds(const std::vector<Id>& locationIds) const
+{
+	if (hasSubject())
+	{
+		return m_subject->getLocalSymbolIdsForLocationIds(locationIds);
+	}
+
+	return std::vector<Id>();
+}
+
 std::vector<Id> StorageAccessProxy::getTokenIdsForMatches(const std::vector<SearchMatch>& matches) const
 {
 	if (hasSubject())