Bring pin facilities from the ecosystem into the stdlib/language

[yoshuawuyts]

Follow up to: #1 (comment).

We should bring ecosystem libraries related to pinning into the Rust stdlib / language. Generally there are two categories of libraries to replace:

• pin-utils for stack pinning (Provided by core::pin::pin!)
• pin-project for pin projections.

References

• Post: Safe pin projections through view types