[ECO-2618] Add emojicoin arena events, update lock in logic

[alnoki]

Description

Logic updates

1. Require that if a user has locked in since their most recent to an empty
   escrow, they must select lock in on subsequent top-off operations.
2. Assorted abstractions, helpers.

Events

1. User events
   1. Enter
   2. Exit
   3. Swap
2. State events
   1. EscrowState
   2. MeleeState
   3. RegistryState
3. NewMelee
4. VaultBalanceUpdate

Testing

git ls-files | entr -c sh -c " \
    aptos move compile --dev --move-2  &&
    aptos move fmt \
"

Checklist

• Did you check all checkboxes from the linked Linear task?

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Name	Status	Preview	Comments	Updated (UTC)
emojicoin-dot-fun	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 20, 2024 11:46pm
emojicoin-dot-fun-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Dec 20, 2024 11:46pm