[DOC] Add links to external resources

[gagdiez]

We need to have some place for all these external resources to be found:

• Aurora
• FastNEAR
• Intear Wallet (and other wallets)
• The Graph
• nomicon / https://near.github.io/nearcore/index.html
• etc ...

[gagdiez]

We can create blogposts about each one of them, no need to make whole pages (Frol's idea)