Update Contacts page with "BOLT 12 contacts" stuff #1205

Describe your content request

Hello, I would like to request updates to the Contacts page based on BOLT 12 contacts

Link to the page
https://bitcoin.design/guide/daily-spending-wallet/contacts/

Why would you like to change the content?
BOLT12 is being upgraded to convey contact & related info, which will change & improve contacts UX a lot, the Guide should reflect that.

Suggestions
If you have a concrete suggestion on how to change/add the content, write it up here

Additional context
Phoenix might already be implementing this. Would love to have input from them or anyone else on this too!
ACINQ/phoenix#645
ACINQ/lightning-kmp#719

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