Contracts<->address explicit conversions

[Jds-23]

Describe the feature

• Contracts can be explicitly converted to address using address(x).
• Explicit conversion to an address payable is only possible if the contract has a receive or payable fallback function

For address to contract

• Unlike contract-to-address conversion, there's no restriction requiring the contract to have a receive or payable fallback function to convert from address to contract type. Simply MyContract c = MyContract(addressValue)

https://docs.soliditylang.org/en/latest/types.html#address
http://docs.soliditylang.org/en/latest/types.html#contract-types

Additional context

No response

[Jds-23]

@onbjerg @DaniPopes, happy to raise a pr for this!

[onbjerg]

Please also provide relevant links in the issue description:) Thanks!