Update IWA TTF properties to v3 and implement a versioning system for backward compatibility

## Problem description

[The current implementation of the IWA TTF properties](https://docs.hedera.com/guardian/guardian/standard-registry/schemas/property-glossary) is not updated with the most recent [v3 version of the standard](https://interworkalliance.github.io/TokenTaxonomyFramework/dmrv/spec/index.html).

In the context of mapping methodologies with the IWA TTF properties correctly, we need to source code to support the current v3 specs, and the future ones.

## Requirements

- Introduce a versioning system for the Guardian IWA TTF properties, so that
- policy developers can define a specific standard to use for the policy (a single spec for each policy).
- users can recognise what IWA TTF specs version is used by the policy both reading the network for published policies or via importing the .policy file.
- Flag the current implementation (v1) as _legacy_, so all policies non-compliant with the new versioning system will be recognized by the system as following the legacy specs.
- Update the list of properties in the source code.
- Update the documentation to support multiple versions of the specs.