Add pallet-control

[2075]

Pallet Control migration.
Since it's a blocker for Flow and Signal pallets, it's required to merge it ASAP without having tests and benchmarks in place.

DONE:

• Pallet Control code migration.

TODO:

• Mocks, tests.
• Benchmarks

Next steps:

1. Test everything together, update zero-protocol runtime.
2. Flow benchmarks, Signal benchmarks.
3. Control tests and benchmarks.
4. Hardening.

[vovacha]

I'm going to merge it since the build is stable. We still have no tests and benchmarks, but the Control pallet is a blocker for Flow and Signal, so it should be merged ASAP.