2.4.0-rc.1

What's Changed

• Fix assistant role pointing to assistant instead of user by @stella-wem in #4
• Add image & document support to Mistral ChatClient by serializing DataContent as multimodal chunks by @stella-wem in #3
• .csproj: package id, versions, authors, urls, release notes, and target framework updated by @stella-wem in #6
• .github/workflows/publish.yml added by @stella-wem in #5

Full Changelog: 2.3.1...2.4.0-rc.1