Add "Run on Lido" section and CSM guide for NOs

[eenti]

Please, go through these steps before you request a review:

📝 Describe your changes

1. Added a link to the new "Run on Lido" section at the introduction page, so folks can access it from there.
2. Created a "Run on Lido" section with Docusaurus' multi-instance feature.
3. Inside "Run on Lido" we added a complete CSM Guide with multiple integration guides, key generation and more.

🔎 Include source of truth for all changes that reference on-chain data (addresses, etc.)

Only references to onchain addresses are to the Lido Execution Layer and Withdrawal Vaults, of both Mainnet and Hoodi.

[dgusakov]

We need to trink about what stuff from http://localhost:3000/staking-modules/csm/guides/ should be moved (to avoid duplicates) and how this new guide will be linked from that section

[dgusakov]

Also review build errors and fix them

[eenti]

We need to trink about what stuff from http://localhost:3000/staking-modules/csm/guides/ should be moved (to avoid duplicates) and how this new guide will be linked from that section

This first one does not include anything repeated from the main guides. In fact some of them are referenced and linked, but I agree. We can discuss later and move some of them.

[eenti]

Reverted package.json and fixed build errors. Please check again @dgusakov.

[dgusakov]

ETH is not claimable directly. Add a note that to get ETH you need to get Withdrawal NFT first