fix: improved code repo validation

[dennisvankekem]

No description provided.

[Copilot]

Pull request overview

Improves APL code repository URL handling by normalizing external repository URLs (and using normalized URLs for duplicate detection), expanding unit tests around URL normalization/rejection, and updating the OpenAPI repoUrl schema pattern/description accordingly.

Changes:

• Normalize external repositoryUrl values on create and compare normalized URLs to prevent duplicates across URL variants.
• Update/extend OtomiStack tests to cover URL normalization cases and reject unsupported SSH URL schemes.
• Update OpenAPI repoUrl description/pattern to accept protocol-less/HTTPS repo URLs with optional .git and trailing slash.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/otomi-stack.ts	Normalizes external repo URLs before saving and uses normalization for duplicate URL checks.
src/otomi-stack.test.ts	Expands coverage to assert URL normalization behavior and rejection of unsupported SSH scheme input.
src/openapi/definitions.yaml	Updates repoUrl schema description and regex pattern to match new accepted URL formats.

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