feat: fin provider

[adamewozniak]

Description

This brings the fin provider over from kujira's fork of our price feeder :^)

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[adamewozniak]

This provider is definitely a beta - according to kujira they've had issues with validators getting blocked on their cloudflare. We'll likely have to follow up on this with a polling implementation.

[adamewozniak]

@Mergifyio backport umee

[mergify]

backport umee

✅ Backports have been created

• #85 feat: fin provider (backport #42) has been created for branch umee