Names the GitHub Action elmulator (was elmulator serve) so the Marketplace listing and the Actions step label read as the project name. No action inputs or outputs changed.
Also refreshes the README front page (the quickstart leads with the in-process Conversation and load-by-name, plus a dedicated GitHub Actions section).
Pin qadanm/elmulator@v0.3.1, or @v0 to track the latest 0.x. The Swift package and its public API are unchanged from 0.3.0.