We are about to introduce a script that generates text files for the
public API surface of various crates.
Run the soon-to-be-introduced script and commit the changes. Covers:
- `hashes`
- `io`
- `primitives`
- `units`
The script and CI setup will be done in the next patch, this is just to
make review easier.
We would like to check for API changes during development and in CI so
that such changes can be discussed separately from the code.
Add tooling and documentation for creating API listings for the public
crates within the workspace (i.e., not `internals`).
Add API text files from an initial run of the script.
Tobin C. Harding
Jose Storopoli