chore: mark test packages as private

[Garbee]

This patch marks the remaining two test packages as private. It also patches the main workspaces configuration to include all the test packages.

Previously the wdio test was published by accident. It was marked as a workspace but not as private. The release test package was not marked as private, but was not included in the workspaces. Therefore it was not published by accident alone.

Now all packages are available as a workspace, while keeping things private that should be.

Fixes: #1238

[Copilot]

Pull Request Overview

This PR prevents accidental publication of test packages by marking them as private and standardizing workspace configuration. The changes ensure that test packages (test/wdio and test/release) are included in the monorepo workspaces but cannot be published to npm.

• Marked test/wdio and test/release packages as private to prevent publication
• Simplified workspace configuration to include all test packages using a wildcard pattern

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
test/wdio/package.json	Added "private": true field to prevent accidental npm publication
test/release/package.json	Added "private": true field to prevent accidental npm publication
package.json	Updated workspaces array to use test/* wildcard pattern instead of listing individual test packages

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