This PR forks a new version of the `zed_extension_api` in preparation
for new changes.
Release Notes:
- N/A
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Co-authored-by: Max <max@zed.dev>
Copies rust files from extension_api/wit to the OUT_DIR to allow
including them from within the crate, which is supported by
rust-analyzer. This allows rust-analyzer to deal with the included
files. It doesn't currently support files outside the crate.
Release Notes:
- N/A