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_gui/qt/element/QtCodeFileList.cpp

@@ -85,6 +85,17 @@ const std::vector<Id>& QtCodeFileList::getActiveTokenIds() const
 void QtCodeFileList::setActiveTokenIds(const std::vector<Id>& activeTokenIds)
 {
 	m_activeTokenIds = activeTokenIds;
+	m_activeLocalSymbolIds.clear();
+}
+
+const std::vector<Id>& QtCodeFileList::getActiveLocalSymbolIds() const
+{
+	return m_activeLocalSymbolIds;
+}
+
+void QtCodeFileList::setActiveLocalSymbolIds(const std::vector<Id>& activeLocalSymbolIds)
+{
+	m_activeLocalSymbolIds = activeLocalSymbolIds;
 }
 
 const std::vector<Id>& QtCodeFileList::getFocusedTokenIds() const