ports-mgmt/caronade: Update to 0.3.0

Changelog v0.3.0 - Return of Slimer:

• Detect affected ports from list of changed/added files and not from CI message
• Use Status API URL from webhook to simplify configuration
• Support Ping Webhooks
• Removed Gitea support
• Updated bulma CSS to 0.8.0
• Updated yaml dependency to 2.2.4

• Git pushes with multiple commits were fixed
• Fix ssh warning about stdin and silence ssh call for ssh recipe
• Improve documentation for remote builder setup
• Documentation fixes