feat: sync schema and rules to fabric

[jeremnaf]

Related Issue

Closes https://github.com/naftiko/fabric/issues/57

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What does this PR do?

Add a new github action which copy schema and spectral rules from framework to fabric (ie. VS Code extension) each time a merge is done into main (if and only if the schema/rules has changed)

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Tests

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Checklist

• CI is green (build, tests, schema validation, security scans)
• Rebased on latest main
• Small and focused — one concern per PR
• Commit messages follow Conventional Commits

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Agent Context (optional)

# agent_name:
# llm:
# tool:
# confidence:          # low | medium | high
# source_event:
# discovery_method:    # runtime_observation | code_review | test_failure | user_report
# review_focus:        # e.g. ClassName.java:line-range

[eskenazit]

LGTM