docs: prepare metadata for GitHub Marketplace publication (#3)

- Update author to 'Hugues Clouâtre' for proper attribution
- Add Latest Release badge to README for better discoverability
- Prepares action for GitHub Marketplace listing

Author: clouatre

README.md

@@ -2,6 +2,7 @@
 
 [![Test Action](https://github.com/clouatre-labs/setup-goose-action/actions/workflows/test.yml/badge.svg)](https://github.com/clouatre-labs/setup-goose-action/actions/workflows/test.yml)
 [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
+[![Latest Release](https://img.shields.io/github/v/release/clouatre-labs/setup-goose-action)](https://github.com/clouatre-labs/setup-goose-action/releases/latest)
 
 GitHub Action to install and cache [Goose AI agent](https://github.com/block/goose) for use in workflows.
 

action.yml

@@ -1,6 +1,6 @@
 name: 'Setup Goose'
 description: 'Install and cache Goose AI agent for GitHub Actions workflows'
-author: 'clouatre-labs'
+author: 'Hugues Clouâtre'
 
 inputs:
   version: