feat: token freeze, kyc and pause (#197)

[arianejasuwienas]

Description:
Adds the support for token freeze, kyc and pause

CryptoTransfer and Key Support included (both functionalities are on different PullRequests, so this one should be merged last).

Related issue(s):

#197

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[acuarica]

Key support is already included, so let's give this priority. Let's make this PR only about Kyc/Freeze/pause, so it's easier to review.

[arianejasuwienas]

@acuarica

The key check is implemented, but it only verifies the key's existence. To determine whether the call can be made, we need to extract the key owner.

If you prefer, we can create a separate issue for the validation. Let me know what works best for you.

[arianejasuwienas]

@acuarica I'm closing this PR because it verifies the key owner, but the implementation includes a lot of code. Instead, I've created a new PR where the key owner is not verified (only key existence is checked) to simplify the review process (as you suggested): #256