[CHECKLIST] Bring template up to date

[Serial-ATA]

• Replace webb-tools with tangle-network (fix: replace "webb-tools" with "tangle-network" #18)
• Delete blueprint.json (chore: delete blueprint.* files #19)
• Delete entrypoint script for Docker (we support env vars now) (chore: remove docker entrypoint script #20)
• Bump the toolchain version (chore: bump rust toolchain #21)
• Stop using SubstrateEventWatcher (chore: update to use new job runner #16)
• Explain the options from cargo-generate in the README (add a gif?)
• Update contracts to the latest tnt-core version (include feat: Slashing hooks tnt-core#13) (fix: point dependabot to the correct directory #17)
• Include the new work for EVM Listeners (Event Flows for Tangle gadget#363)

[shekohex]

@Serial-ATA Could we add this to the Update tangle-network/tnt-core#13?

[shekohex]

Updated the checklist.