feat: hourglass (task-based AVS framework) (#1534)

**Motivation:**

We need to migrate the hourglass core contracts from
https://github.com/Layr-Labs/hourglass-monorepo/tree/master/contracts.

This is due to the following reasons:
* Better security posture of the core contracts repository
* Automatic support of Zeus for contract upgrades
* Easier maintainability along with other core contracts which will be
governed by the protocol council.

**Modifications:**

* TaskMailbox and interface
* Extensive unit tests for the TaskMailbox (with appropriate Mock
contracts)
* Updated bindings (Including stale bindings from Multichain)
* Smart contract documentation for the TaskMailbox

**Result:**

The Hourglass core contract migration.

Author: 0xrajath