Checks during PR validation pipeline

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"As a customer submitting a model to the DMR, I can see checks as part of the PR process telling me that if my model is valid or not."

• [x] Check File/Folder consistency with DTMI
• [x] Check Unique IDs
• [x] Check Dependencies are available
• [x] Check DTDL conformance

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split in 3

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• 38 (this issue)

• 47

• 46

• 75