[nodes] Describe instruction events

[lorisleiva]

Since instructions can "emit events" by writing logs to the ledger — e.g. Anchor events, Account compression, etc. — it would be useful to describe these "events" in an framework agnostic way. Perhaps a simple InstructionEventNode array on the InstructionNode with simple name and docs attributes could be enough as a first step?

[stegaBOB]

Completed in #985!

[stegaBOB]

Actually that might not handle emit_cpi properly. Might need some extra consideration/definitions

[daog1]

Actually that might not handle emit_cpi properly. Might need some extra consideration/definitions
It needs to be added so that it can be handled.

if (areArraysEqual(dataBuffer.slice(0, 8), hex("e445a52e51cb9a1d"))) {
     parsedData = parseEventData(node, dataBuffer.slice(8));
} else {
   parsedData = parseEventData(node, dataBuffer);
}