#8500: fix: Remove workspace:* from devDependencies in voice-call plugin

## Summary Removes \`"openclaw": "workspace:*"\` from devDependencies in `extensions/voice-call/package.json`. The \`workspace:\` protocol is not supported by npm when installing packages outside a pnpm workspace, causing \`EUNSUPPORTEDPROTOCOL\` errors during plugin installation. ## Problem Installing \`@openclaw/voice-call\` via \`openclaw plugins install @openclaw/voice-call\` fails with: ``` npm error code EUNSUPPORTEDPROTOCOL npm error Unsupported URL Type "workspace:": workspace:* ``` ## Solution Remove the devDependencies entirely. The \`openclaw\` dependency is not required at install time since the runtime resolves \`openclaw/plugin-sdk\` via jiti alias. ## Testing Workaround verified on remote server: ```bash cd ~/.openclaw/extensions/voice-call cat package.json | jq 'del(.devDependencies)' > package.json.new && mv package.json.new package.json npm install --omit=dev ``` ## Related Issues Fixes #6879 Fixes #8492 <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> This PR updates the `@openclaw/voice-call` extension’s `package.json` to remove the `workspace:*`-based `openclaw` entry from `devDependencies`. That change prevents `npm` from failing with `EUNSUPPORTEDPROTOCOL` when the plugin is installed outside of a pnpm/yarn workspace (e.g., via `openclaw plugins install …`), while keeping runtime behavior unchanged since the plugin SDK is resolved via the runtime’s aliasing/jiti setup. <h3>Confidence Score: 5/5</h3> - This PR is safe to merge with minimal risk. - The change is confined to a single `package.json` dependency entry and directly addresses a known `npm` incompatibility with the `workspace:` protocol during out-of-workspace installs. There are no code-path changes and low likelihood of regressions beyond local dev workflows for this extension. - No files require special attention <!-- greptile_other_comments_section --> _{(2/5) Greptile learns from your feedback when you react with thumbs up/down!} **Context used:** - Context from `dashboard` - CLAUDE.md ([source](https://app.greptile.com/review/custom-context?memory=fd949e91-5c3a-4ab5-90a1-cbe184fd6ce8)) - Context from `dashboard` - AGENTS.md ([source](https://app.greptile.com/review/custom-context?memory=0d0c8278-ef8e-4d6c-ab21-f5527e322f13)) <!-- /greptile_comment -->