fix: adds delete and get subscription route

[nicholaswma]

No description provided.

[7i7o]

tACK 👍

Usage issues:

• devs can read all subscriptions if they have the permissions
• deleteSubscription actually removes the subscription instead of canceling from the list of subscriptions (user can no longer see their past payments or previous subscription)
• deleteSubscription doesn't show popup neither needs any user confirmation
• devs can delete any subscription (without user confirmation) if they know the targetId

Previous subscription rough edges:

• If user cancels a subscription, they can no longer subscribe to the same address: Console shows Account is already subscribed. Users need to remove subscription (loosing all subscription payments history) to be able re-subscribe.