Error Codes Tracking Issue

[sukunrt]

Specs

• error codes: provide error codes on stream reset and connection close specs#623
• yamux: add error codes on stream reset specs#622

Implementation

• Implement error codes spec #2927
• Setup Registry: https://github.com/libp2p/error-codes/
• Yamux Extension: add support for sending error codes on session close go-yamux#121

Applications

• AutoNAT v2
• Circuit v2
• Identify?
• Gossipsub
• Kad-dht