* Enhanced peer-ex protocol - added rate limiting, added response status and desc to the rpc
* Better error result handling for PeerEx request, adjusted tests
* Refactored RateLimit configuration option for better CLI UX - now possible to set separate limits per protocol. Adjusted mountings. Added and adjusted tests
* Fix libwaku due to changes of error return type of fetchPeerExchangePeers
* Fix rate limit setting tests due to changed defaults
* Introduce new gauge to help dasboard effectively show current rate limit applied for protocol
* Adjust timeing in filter rate limit test to let macos CI test run ok.
* Address review findings, namings, error logs, removed left-overs
* Changes to reflect latest spec agreement and changes. PeerExchange RPC is changed the now respond structure will contain status_code and status_desc.
* bump_dependencies.md: add nim-results dependency
* change imports stew/results to results
* switching to Nim 2.0.8
* waku.nimble: reflect the requirement nim 1.6.0 to 2.0.8
Adding --mm:refc as nim 2.0 enables a new garbage collector that we're
not yet ready to support
* adapt waku code to Nim 2.0
* gcsafe adaptations because Nim 2.0 is more strict
