Feature/pro 305 integrate layer zero/stargate protocol

[lbw33]

Description

• Amended StargateFacet contract to handle new changes in logic. Updated and added an ETH transfer function that is a new feature that Stargate has enabled.
• Removed some logic from the old contract as it can be handled by backend (pool ids).
• Test suite updated and amended for new iteration of contract.

Motivation and Context

• To update the StargateFacet contract to comply with latest Stargate changes and to add new functionality.

How Has This Been Tested?

• Test suite (see screenshots).

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[linear]

PRO-305 Etherspot to integrate LayerZero/Stargate protocol

Integrate LayerZero/Stargate protocol to Etherspot's cross-chain aggregation solution

More information: https://layerzero.gitbook.io/docs/guides/master/how-to-send-a-message

Documentation and example code: https://stargateprotocol.gitbook.io/stargate/

[lbw33]

There is one test that is commented out which is not working correctly that I am currently in discussion with Stargate on how to solve. Rather than hold up the PR for this I will amend this test separately when the problem has been debugged.

SGReceiver.sol is part of this test to check the logic executes correctly on receiving chain.

[ch4r10t33r]

LGTM