Allow saving of types and capabilities into contracts/resources in Playground

[MaxStalker]

Instructions

NFT or contract could have a field specified on them, which gives a hint on type to cast the reference.

Problem

Playground doesn't seem to support this at the moment.

Steps to Reproduce

Here is Playground with test case:
https://play.onflow.org/603a8982-9198-4be7-9f55-0cc91ae29f6f

• Deploy FungibleToken contract from 0x01
• Try to deploy CustomVault contract from 0x02 - Playground will throw GraphQL error: internal system error

[turbolent]

The error message is cannot export value of type interpreter.TypeValue, which comes from runtime.exportValueWithInterpreter.

This function is used by the Playground to show the account state, so the problem is only there – storage of type values is supported and should work in the emulator and on networks.

Related is #259, which added support for exporting links and references. I had listed the value type which still need to be added here #259 (comment), but it looks like the closing PR didn't add support for type values.

[turbolent]

The cause for this is the missing support for exporting types and capabilities to JSON.