* Refactor Block/Header definition
Refactor block/header definition so that it's now responsibility
of the nomos-core crate. This removes definitions in ledger/consensus
crates since there's no need at that level to have an understanding
of the block format.
The new header format supports both carnot and cryptarchia.
* A wrapper crate for prometheus client
* Initial integration of metrics for mempool
* Merge mempool metrics imports
* Add cli flag to enable metrics
* Add nomos metrics service for serving metrics
* Use nomos prometheus metrics in the node
* Rename metrics to registry where applicable
* Expose metrics via http
* Featuregate the metrics service
* Style and fail on encode error
* Add metrics cargo feature for mempool
gusto
Al Liu
Youngjoon Lee
Giacomo Pasini
Daniel Sanchez