Add missing information - lost while porting

[Saransh-cpp]

• add the GSoD page
• add the Governance page to the navbar
• comment out navbar links for GSoC and GSoD pages (as they were in the old website)
• add AMD's logo

PR Checklist

• [ ] Tests are added
• [ ] Documentation, if applicable

[darsnack]

The navbar changes were intentional cause it was getting crowded. We could probably comment out GSoC too for now.

[Saransh-cpp]

Ah, my bad. Should I comment out the governance page from the navbar too?

[darsnack]

Yeah I would do that for now

[Saransh-cpp]

Done!