Resize world volume functionality

This MR introduced the possibility to resize the world volume to the real need depending on the geometry that is built. This functionality is currently used in fullSimlight (and all the G4 dependent tools) when a geometry is built starting from a plugin and gmcat. In addition to that this MR:

• Changes the name of Air used for the world volume in FullSimLight/gmcat to avoid conflicts with other definitions
• Makes sure the definition of Air is the same as the one used in Athena
• Fixes a compilation bug in the HelloGeoReadG4 example

changed the description

added 16 commits

• 281b4649...6a3140fc - 7 commits from branch main
• 4e5770e8 - Fix compilation error on HelloGeoReadG4 example
• 49996363 - Change the name of Air used for the world volume in FullSimLight to avoid...
• aabcecd1 - Add new functionality to resize the world volume
• a325dc3c - Move GeoModelFuncSnippets from GeoModelTools to GeoModelCore
• 16c7b3de - Change the constants used to define elements in Air to match the values usedd in Athena
• 14449433 - Use the GeoModelFuncSnippets function to create the world volume
• 69295f16 - Remove the ResizeTheWorld function from FSLDetectorConstruction class and...
• 91564fd2 - Resize the world volume in gmcat
• 362ea1e6 - Move the additional GeoModelFuncSnippets files under GeoModelCore

Compare with previous version

added 1 commit

• c59c946b - Fix implicit instantiation of undefined template compilation error on MacOS

Compare with previous version

changed title from Change the name of Air used for the world volume in FullSimLight to avoid... to Resize world volume functionality

merged

mentioned in commit 0a677daf