Send a batch of dispatch calls and atomically execute them.
The whole transaction will rollback and fail if any of the calls failed.

May be called from any origin except `None`.

- `calls`: The calls to be dispatched from the same origin. The number of call must not
  exceed the constant: `batched_calls_limit` (available in constant metadata).

If origin is root then the calls are dispatched without checking origin filter. (This
includes bypassing `frame_system::Config::BaseCallFilter`).

## Complexity
- O(C) where C is the number of calls to be batched.

- **Problem Statement:** Lack of clarity on the Polkassembly ReferendumV2 for the Polkadot community.
- **Significance:** Ensuring transparency and understanding among Polkadot community members.
- **Proposed Solution:** Provide detailed information and explanations on the Polkassembly ReferendumV2.
- **Expected Outcomes:** Increased community engagement and informed decision-making.

#223 title

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