Update GoVPP info on FD.io & VPP docs websites

[ondrej-fabry]

This issue tracks progress of updating info about GoVPP project on official FD.io web sites.

Description

The official web for the FD.io project (https://fd.io/) is lacking any info about the GoVPP sub-project and web for the VPP documentation (https://s3-docs.fd.io/vpp/master/developer/build-run-debug/) contains limited or outdated info.

TODO

Here are few places to start with:

• [x] mention GoVPP Community Meetings under Meetings @ https://fd.io/getinvolved/community/
• [x] add info for developers under VPP Developer Resources @ https://fd.io/getinvolved/community/
• [x] mention GoVPP Slack channel under Communication Channels @ https://fd.io/getinvolved/community/
• [x] mention GoVPP mailing list under Mailing Lists @ https://fd.io/getinvolved/community/
• [x] update info under Interfacing with VPP / Go api (govpp) @ https://s3-docs.fd.io/vpp/23.02/interfacing/go/index.html
• [x] add link to GoVPP to top navigation bar under Documentation @ https://fd.io/

[Neilblaze]

@ondrej-fabry Is this open to contributions?

[ondrej-fabry]

@ondrej-fabry Is this open to contributions?

Gerrit change with some update to GoVPP info in VPP repository was just merged today: https://gerrit.fd.io/r/c/vpp/+/38498

However, the changes were minimal, just updating outdated info, so you are welcome to contribute with improving the document.

[Neilblaze]

Thanks! Looking forward to it. @ondrej-fabry 😄 Also, I'd be highly obliged if you can spare a moment to see this.