Latest versions of `@ape//ape:zstd` are fully operational.

Bazel 9 will default `--enable_workspace` to `false`.

Disable it now.

Bazel will select a version that is within `compatibility_level` so the warning is noise.

Includes breaking change to `toolchain_local_select` which
does not affect this module but is a needed updated for Bazel 8

The `@ape` Zstandard binary is exhibiting bugs on MacOS and
with streaming `stdin` on multiple platforms.

Registering the `superconfigure` toolchain as default to see
if this fixes the issues. Eventually, we should be able to
relax back to `@ape`.

[1]: https://github.com/ahgamut/superconfigure/issues/51

The `@ape` Zstandard binary is exhibiting bugs on MacOS and
with streaming `stdin` on multiple platforms.

Adding a new toolchain that can be updated to the cutting
edge `superconfigure` APE binaries.

[1]: https://github.com/ahgamut/superconfigure/issues/51

Uses `@ape//ape/toolchain/info:diff` target.

`@ape//:zstd` is deprecated.