feat: add plural support

[floreks]

• Added custom plural manager that can recognize our CRD objects such as ServiceDeployment, Repository, etc. and trigger an update for ServiceDeployment helm charts.
• Added a custom build and release pipeline
  • Docker image will be pushed to GHCR
  • Helm chart will be pushed to GHCR OCI registry
  • Every push to master will trigger an automated version bump and a release
• Added support for custom event callback when:
  • Dependency Pull Request is being created or updated
  • Dependency dashboard issue is being created or updated
• Added support for Plural Console API:
  • Added new apiToken argument to access Plural Console API. It is automatically translated into RENOVATE_API_TOKEN env var
  • Added new apiUrl argument to point to the Plural Console API (RENOVATE_API_URL env var)

and more...