chore(ci): teach publish.yml to publish @melonjs/capacitor-plugin

[obiot]

Summary

Adds capacitor-plugin to the publish workflow so the new package can be released the same way as the existing plugins.

Two-line change:

• New entry in the workflow_dispatch.inputs.package choice list.
• New elif branch in the Set package directory step, pointing at packages/capacitor-plugin with pnpm clean && pnpm build (mirrors the existing plugins' build command).

Notes

• npm publish --access=public --provenance works identically for the new scoped package — no flow changes required.
• One-time prerequisite: npmjs.com needs a trusted-publisher entry for @melonjs/capacitor-plugin (or the @melonjs scope config has to cover it). If the first publish fails on missing trust config, configure a "pending publisher" entry under the melonjs npm user's package settings and re-run.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Updates the manual npm publish workflow to support publishing the new @melonjs/capacitor-plugin package alongside existing plugins.

Changes:

• Adds capacitor-plugin to the workflow_dispatch.inputs.package choice list.
• Adds a corresponding package-directory/build-command selection branch pointing to packages/capacitor-plugin with pnpm clean && pnpm build.

Comments suppressed due to low confidence (1)

.github/workflows/publish.yml:75

• The package selection script has no fallback/validation path. If inputs.package ever contains an unexpected value (e.g., options list changes, or workflow_dispatch is invoked via API), dir/build_cmd will be unset and later steps will fail with a confusing error. Consider adding a final else that prints an error and exits non-zero (or switch to a case with a default branch).

          elif [ "${{ inputs.package }}" = "capacitor-plugin" ]; then
            echo "dir=packages/capacitor-plugin" >> "$GITHUB_OUTPUT"
            echo "build_cmd=pnpm clean && pnpm build" >> "$GITHUB_OUTPUT"
          elif [ "${{ inputs.package }}" = "create-melonjs" ]; then
            echo "dir=packages/create-melonjs" >> "$GITHUB_OUTPUT"
            echo "build_cmd=echo 'No build step needed'" >> "$GITHUB_OUTPUT"
          fi

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