Decisions of Polkadot Update (for JAM)

[shawntabrizi]

This updates the Decisions of Polkadot presentation to fit into the context around JAM.

Changes:

• Start with Parallel Execution and Data Sharding
  • Move up execution cores, move down wasm
• Change Wasm to "Execution Meta-Protocol"
  • We reference that our choice today is WASM, but the title allows us to evolve to PolkaVM
• Change some references to "parachains" to "Web3 Applications", where it makes sense.
• Remove Sassafras
• Add a section about JAM
  • What is JAM (in just a few words)
  • The decisions of JAM
    • What is the same / different from Polkadot v1