Update to be compatible with voc4cat-tool 1.0.0 (v1.0 formats) - #107

Adapt voc4cat-template to the new xlsx template format v1.0 and partitioned concept storage introduced in voc4cat-tool v1.0.0.

Key changes:

• Migrate vocab_example to partitioned storage (IDs0000xxx/ subdirs)
• Update idranges.toml to v1.0 format with ConceptScheme metadata (title, description, creator, publisher, license, etc.)
• Remove binary xlsx template. In v1.0.0, voc4cat-tool generates templates dynamically.
• Add --redundant-hierarchies check for RDF.
• Use --prov-from-git provenance data from git history
• Add pr-checks.yml workflow for contributor guidance (Add pull-request check action from voc4cat #97)
• Harden workflows: concurrency groups, explicit permissions, updated action versions.
• Install main branch of voc4cat-tool by default (customize to a specific version in your derived repositories)

Closes #104