Add a protocol extension enable user to manage their privacy and access list

[abishekk92]

Users would want to make some of their stories private by exposing the following instructions.

1. createPrivatePost
2. updatePrivatePost
3. deletePrivatePost

The user should also be able to create different ACL rules that defines when or how the post can be decrypted.

[micaelehn]

Solcerberus is being built for this exact purpose. https://solcerberus.com/
ACL for Solana programs, which can let the users define wallets or NFTs that give specific permissions.

A user could set it up so only those holding a specific NFT can access the content for example. And with optional expiry of access to create a subscription system.