readNdraft IMAP MCP v0.6.0

What's Changed

• Add configurable sender display names by @LeoPhoenixT in #28
• Add named recipients and reply draft threading by @LeoPhoenixT in #29
• Prepare release 0.6.0 by @LeoPhoenixT in #30

Full Changelog: v0.5.1...v0.6.0