Migrate from Dependabot to Renovate

Dependabot works, but loves to create MRs

Renovate creates an issue with checkboxes to create MRs when needed

This could also be further automated once automated testing is completed to automatically merge minor package updates (See !86 (merged))

• https://docs.renovatebot.com/self-hosted-configuration/
• https://docs.renovatebot.com/examples/self-hosting/
• https://docs.renovatebot.com/getting-started/installing-onboarding/
• https://loganmarchione.com/2022/10/how-to-run-renovate-on-a-self-hosted-gitea-and-drone-instance/