[Booklore] Replace Booklore with Grimmory

[asmaier]

Booklore is not maintained anymore. The official successor is Grimmory:

• https://grimmory.org/
• https://github.com/orgs/grimmory-tools/discussions/118

The only change necessary seems to be a change of the docker image path in the docker-compose.yml from

image: booklore/booklore:v2.2.0@sha256:346064cb1fef6149dad2d8a373ea5fd1a7e3b61c22540995e40e8452136e202b

to

image: grimmory/grimmory:v2.2.1

See

• https://github.com/grimmory-tools/grimmory?tab=readme-ov-file#step-2-docker-compose