* fix: discovery for peer-exchange
use the bootstrap node as a starter to send a
peer-exchange query to, and emit the response
peers received from it for further connection to
libp2p using the peer-discovery interface
* init: test for libp2p bootstrap/discovery for
peer-exchange
* temp-add: console.logs for easier debugging
* add: peer discovery test & rm: console.logs
* chore: rm and redundant spec test
* add: interval for peer exchange queries
we set an interval to query a peer every 5 minutes
for peer exchange, and add new peers if found
* address: reviews
- add `type` for imports not using values
- better handling for peer-exchange query interval
* chore: fix tsc for peer-exchange
use node16 for module resolution
* chore: add extra exports to fix typedoc warnings
ref: https://github.com/TypeStrong/typedoc/issues/1739
@waku packages are expected to (dev)depend on @waku/interfaces to
implement them. Hence, to avoid possible cyclic (dev)dependency, define
IEnr interface and use it as a type across @waku/packages.