add "Running IOCs" field to instrument page

I think this is an easy win as all you need to do is subscribe to
`IN:INST:CS:BLOCKSERVER:IOCS`, dehex and parse some JSON (we do this for the instlist already) then map it to a component.

make sure to create an interface for
A) the list of IOCs
B) the "IOC" object, which looks like this:
```json
"AEROFLEX_01": {
"description": "Aeroflex Signal Generator",
"running": false,
"macros": [
{
"description": "Serial COM port",
"pattern": "^COM[0-9]+$",
"defaultValue": null,
"hasDefault": "NO",
"name": "PORT"
},
{
"description": "Bus address e.g. GPIB address",
"pattern": "^[0-9]+$",
"defaultValue": "0",
"hasDefault": "YES",
"name": "BUS_ADDR"
},
{
"description": "IP Address of prologix GPIB converter",
"pattern": "^[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+$",
"defaultValue": null,
"hasDefault": "NO",
"name": "PL_IPADDR"
},
{
"description": "Type of Aeroflex",
"pattern": "^(2023A|2030)$",
"defaultValue": "2023A",
"hasDefault": "YES",
"name": "DEV_TYPE"
}
],
"pvsets": [],
"pvs": []
},
```

consider using something similar to the "Block" component where you have a basic
IOCNAME: RUNNINGSTATUS on first glance, but can expand to show the rest of the information.