Open questions from spec FAQ

[palango]

In the spec there were some open questions which I think fit better in the docs.

Testnet

• How do I run a node or upgrade an existing node?
• Can I use an RPC endpoint?
• Is there a faucet? Where? How do I get funds?
• Which wallets are supported?
• Which CLI tooling can I use?
• What can I do through the CLI?
• Is there an explorer?
• What SDK should I use?
• How can I check that my accounts’ state was correctly migrated?
• What is the migration, how does it work, how can I be sure it’s correct?
• How can I use the native bridge?
• How does native bridging compare with old bridging?
• Is there anything that used to work on Alfajores that doesn’t anymore?
• What are the costs for L1 data and how are they payed?
• I saw EigenDA mentioned, is it used?
• How do Celo tokenomics work with the change?

What happened to these features?

• CELO token duality? supported, see Token Duality
• fee currencies? supported, see Fee Abstraction
• staking?
• validators?
• epoch rewards? no longer supported, see L2 CELO Distribution Schedule
• governance?

What happened to these services?

• stCelo?
• Optics?
• SocialConnect?