feat: IC-1680: Node Provider Rewards Canister

[pietrodimarco-dfinity]

Node Provider Rewards Canister

First implementation of the Node Provider Rewards (NPR) canister.
In its initial version, the canister just fetches and stores registry data and subnets node metrics.
It updates registry deltas and retrieves metrics from the management canister of various subnets daily storing everything in stable memory.

TODO:

• Move the Registry Client (rs/dre-canisters/node-provider-rewards/canister/registry_store.rs) to the IC repository.
• Implement logic to compute DailyNodeMetrics from StableSubnetsMetrics and test the conversion.
• Finish development NPR library (V1) to compute rewards with penalties and add canister endpoints for computing rewards.
• Add PocketIC tests.