feat(evm)!: Added support for creating cross chain non fungible asset transfer transactions

[saadahmsiddiqui]

feat(evm)!: Added support for creating cross chain non fungible asset transfer transactions

Description

• Added two BaseClasses between ERC20, ERC721 and Generic transfer classes as there was room for reasonable abstraction among them.
• Renamed main files with more descriptive names
• Fixed breaking tests

Breaking Changes:

• createEvmFungibleAssetTransfer renamed to createFungibleAssetTransfer as it doesn't provide unnecessary context.
• setAmount renamed to setTransferAmount to match with getter name in FungibleAssetTransfer
• amount within FungibleAssetTransfer is now protected and its getter is called transferAmount
• destinationAddress address has been renamed to recipientAddress in fungible asset transfer class

Closes:$ #345

How Has This Been Tested? Testing details.

• TODO: unit tests for NonFungibleAssetTransfer class.
• TODO: units tests for createNonFungibleAssetTransfer function.

Types of changes

• [X] New feature (non-breaking change which adds functionality)
• [X] Breaking change (fix or feature that would cause existing functionality to change)
• [X] Documentation

Checklist:

• [X] I have commented my code, particularly in hard-to-understand areas.
• [X] I have ensured that all acceptance criteria (or expected behavior) from issue are met
• [x] I have added tests to cover my changes.
• [x] I have ensured that all the checks are passing and green, I've signed the CLA bot