[Rust] Document our approach to unsafe code in README #18413
Description
It would be helpful to document the project's stance on the use of unsafe code in a prominent location such as in the top-level README so that we can refer people to this when questions are asked about this.
Reporter: Andy Grove / @andygrove
Assignee: Jorge Leitão / @jorgecarleitao
PRs and other links:
Note: This issue was originally created as ARROW-10889. Please see the migration documentation for further details.