This is so we can use RootScope to load any Gyro file. This will be used by the new Vault system to load/store secrets using the Gyro language format.

Implements:

- Vault abstract class that custom vault implementations can subclass
- LocalVault implementation that stores encrypted secrets in .gyro directory
- VaultCommand for getting/setting and listing secrets
- VaultReferenceResolver to provide a method to lookup secrets within Gyro configs
- VaultDirectiveProcessor for configuring vault implementations in .gyro/init.gyro

This work is intended to allow a custom value that can alter how it's serialized to state.

For VaultSecret it'll write "$(vault-lookup key vault hash)" in state.

This fixes an issue where all files were being evaluated when loading the local vault. This would fail because the vault itself is not defined in this use case.

This is just a temporary fix. Need to investigate why this fails when only a single instance of a vault is defined.