Add the current status of the bridge

[nud3l]

Goal

Add the status of individual components of the Interlay/Kintsugi networks.

Implementation

Store the state of a protocol along with its type and until when it was valid. Exact states will depend on the parachain events. Needs to be decided in interlay/interbtc#819

"state": [
  {
    "state": "Running",
    "type": "Bridge",
    "tillTimestamp": "2022-07-29T13:04:06.656000Z"
  },
  ...
]

Replaces