Whitefox logical organization

Concepts:

Towards recipients, the logical organization of tables is the following:

• Share: A share is a logical grouping to share with recipients. A share can be shared with one or multiple recipients. A recipient can access all resources in a share. A share may contain multiple schemas.
• Schema: A schema is a logical grouping of tables. A schema may contain multiple tables.
• Table: A table is a Delta Lake table or a view on top of a Delta Lake table.
• Recipient: A principal that has a bearer token to access shared tables.
• Sharing Server: A server that implements this protocol.

Internally organization is a bit more complex:

• Provider: a composed entity that allows to access a table existing in an external system. A provider is composed by a storage system and optionally a metastore (or catalog?)
• Storage: an object storage that contains the table data
• Metastore: a system that provides metadata about tables, it is mandatory for Iceberg tables and can be useful for discovery in general