Add SWMH cultures to hellenic/druidic/gaelic culture lists.

The game happily igores any line it doesn't understand, which makes listing unknown cultures/religions in an OR scope a non-problem.
ExtendedLegacyOfRome: Make some slight improvements to the "Restoration of Rome" event chain.

This is primarily in preparation for the PB compatibility mod.
ExtendedLegacyOfRome: Move the "The Restoration of Rome" events into a separate file.
ExtendedLegacyOfRome: Adjust the "The Restoration of Rome" event ids.

Do not reuse the original LoR event ids.
SWMH_ACR: Update to SWMH v2.8.11 and ACR git.
PB_ACR: Update to PB v3.2.29 and ACR git.