subgraph-beanstalk2.4.0 + add standardized Version entity to all subgraphs

[soilking]

subgraph-beanstalk

• Fixes to silo: stalk now matches up with s.s.stalk
  • No longer separates stalk/plantableStalk - plantableStalk is added into stalk immediately and decremented separately
  • Fix mishandling of user withdrawing Germinating assets prior to completion of the germination period
  • Fix for when germination begins on the prior season upon certain converts
• Removed unnecessary entities that simply tracked the emission of an event. Everything except Marketplace events was removed.
• Removed unnecessary fields from SiloDeposit entity:
  • amount (use depositedAmount)
  • bdv (use depositedBDV)
  • withdrawnAmount
  • withdrawnBDV
• Add detailed unripe/chop statistics. See UnripeToken and Chop entities.
• Major file restructure/refactor
  • Separate data sources for legacy events that can no longer be emitted on chain
  • Standardized handling of hourly/daily snapshots

All subgraphs

• Added version entity which contains some basic metadata about that subgraph. The standardized format can be easily queried across all subgraphs.