Feature/evsemanager persistent transactions

[corneliusclaussen]

Describe your changes

• EvseManager can now use a PersistentStore module to store the transaction UUID. This is used to cleanup dangling sessions on Eichrecht power meters and issue a correct TransactionFinished event including OCMF on the next boot.
• Added SessionEventEnum SessionResumed to allow the evse_manager to indicate that a previous session has been resumed at startup
• Added subscription to this event to OCPP module so that OCPP is aware that the EvseManager is aware of previous transactions. This allows OCPP to not terminate such transactions individually every time

Issue ticket number and link

Companion PR in libocpp: https://github.com/EVerest/libocpp/pull/704

Checklist before requesting a review

• [X] I have performed a self-review of my code
• [ ] I have made corresponding changes to the documentation
• [X] I read the contribution documentation and made sure that my changes meet its requirements