feat: emit standardized block broker events

[achingbrain]

So callers do not kneed to know how a node is configured in advance, emit standardized events for block broker operations.

Depends on:

• feat: add high-level connection and stream progress events libp2p/js-libp2p#3429
• chore: release main libp2p/js-libp2p#3431

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if necessary (this includes comments as well)
• I have added tests that prove my fix is effective or that my feature works