Test release script

Fix double-zip nesting in manual workflow_dispatch artifact

actions/upload-artifact always wraps the given path in its own zip.
Pointing it at the already-built therapist-directory.zip produced a
zip-of-a-zip when downloaded from the Actions run summary, which
WordPress cannot install (no valid plugin header found). Upload the
unzipped plugin folder instead so a single extraction/zip yields a
valid plugin package. The release-triggered path (softprops/action-gh-release)
was already correct and unaffected: verified the v1.0.1 release
asset therapist-directory.zip has the right top-level folder
structure.

Co-Authored-By: Warp <agent@warp.dev>

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