robust broadcasting config with multiple failovers

[sirdeggen]

Description of Changes

Added a braodcaster which sends to all popular miners & indexers.

Testing Procedure

Describe the tests you've added or any testing steps you've taken.

• I have added new unit tests
• All tests pass locally
• I have tested manually in my local environment

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have updated CHANGELOG.md with my changes
• I have run the linter

[Copilot]

Pull Request Overview

This PR implements a robust broadcasting configuration with multiple failovers for transaction broadcasting. The implementation includes a new SuperArc class that attempts to broadcast transactions through multiple providers sequentially until one succeeds.

• Added a new BitailsBroadcaster class for the Bitails API
• Created SuperArc class that tries multiple broadcasting services in order (TAAL, GorillaPool, BSVA, WhatsOnChain, Bitails)
• Updated TypeScript target to ES2020 to support BigInt literals

Reviewed Changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
back/tsconfig.json	Updated TypeScript target to ES2020 for BigInt support
back/src/functions/utxoStatusUptate.ts	Refactored to use new woc module for BEEF retrieval
back/src/functions/allFunds.ts	Updated to use ArcTaal instead of Arc for transaction broadcasting
back/src/arc.ts	Complete rewrite to implement SuperArc with multiple broadcaster failover
back/src/BitailsBroadcaster.ts	New broadcaster implementation for Bitails API
back/package.json	Version bump and BSV SDK update

Files not reviewed (1)

• back/package-lock.json: Language not supported

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