feat: external tools registry with types and user credentials

[Imene-Amirat]

No description provided.

[Copilot]

Pull request overview

Adds support for representing external tools both as catalog-level resources (discoverable via hypermedia links) and as user-associated embedded objects, and introduces an editWith submission metadata field for pointing to an external editor.

Changes:

• Add a new LinkedData::Models::ExternalTool model and expose it via a new external_tools link in the MOD catalog.
• Add a new embedded LinkedData::Models::Users::ExternalTool model and wire it into User as externalTools.
• Add editWith to OntologySubmission and the ontology submission scheme YAML.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
lib/ontologies_linked_data/models/users/user.rb	Adds externalTools attribute and embeds it alongside subscription.
lib/ontologies_linked_data/models/users/external_tool.rb	Introduces an embedded per-user external tool object (currently includes an API key).
lib/ontologies_linked_data/models/ontology_submission.rb	Adds editWith metadata attribute for submissions.
lib/ontologies_linked_data/models/mod/semantic_artefact_catalog.rb	Adds catalog link for external_tools and requires the new model.
lib/ontologies_linked_data/models/external_tool.rb	Adds top-level ExternalTool model for catalog exposure.
config/schemes/ontology_submission.yml	Reformats scheme content and adds editWith field (currently introduces YAML trailing-comma issues).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.