#23236: docs: add @itsuzef/live-events to community plugins page

## Summary - Adds the **Live Events** plugin by [@itsuzef](https://github.com/itsuzef) to the community plugins listing. - Plugin searches upcoming concerts, sports, and theater via the Ticketmaster Discovery API. ## Plugin details - npm: `@itsuzef/live-events` (published, MIT) - repo: https://github.com/itsuzef/openclaw-live-events - install: `openclaw plugins install @itsuzef/live-events` ## Quality checklist - [x] Published on npm and installable - [x] Public GitHub repo with README covering setup, config, and CLI usage - [x] Issue tracker enabled - [x] Active maintainer (just published) <!-- greptile_comment --> <h3>Greptile Summary</h3> Adds the Live Events plugin to the community plugins page. The plugin enables searching for upcoming concerts, sports events, and theater shows via the Ticketmaster Discovery API. The entry follows the required format and includes all necessary information (name, description, npm package, repository, and install command). The PR author has confirmed the plugin meets the quality bar requirements: published on npm, public GitHub repo with documentation, issue tracker enabled, and active maintenance. <h3>Confidence Score: 5/5</h3> - This PR is safe to merge with minimal risk - This is a documentation-only change that adds a single plugin entry following the exact format specified in the community plugins documentation. No code changes, no breaking changes, and the format matches the documented template precisely. - No files require special attention _{Last reviewed commit: 694d210} <!-- greptile_other_comments_section --> _{(4/5) You can add custom instructions or style guidelines for the agent [here](https://app.greptile.com/review/github)!} <!-- /greptile_comment -->