v3.0.0a1

#1240 for details

Changed:

• 🔥 Deprecate Processor.process
• update spec to v3.25.0, which requires annotating fileGrp cardinality in ocrd-tool.json
• 🔥 Remove passing non-processing kwargs to Processor constructor, add as members..
  (i.e. show_help, dump_json, dump_module_dir, list_resources, show_resource, resolve_resource)
• 🔥 Deprecate passing processing arg / kwargs to Processor constructor..
  (i.e. workspace, page_id, input_file_grp, output_file_grp; now all set by run_processor)
• 🔥 Deprecate passing ocrd-tool.json metadata to Processor constructor
• ocrd.processor: Handle loading of bundled ocrd-tool.json generically

Added:

• Processor.process_workspace: process a complete workspace, with default implementation
• Processor.process_page_file: process an OcrdFile, with default implementation
• Processor.process_page_pcgts: process a single OcrdPage, produce a single OcrdPage, required to implement
• Processor.verify: handle fileGrp cardinality verification, with default implementation
• Processor.setup: to set up processor before processing, optional