Invalid models should be better seperated from valid models

[Steven Kopsa]

Options for separating invalid models

• Bold text with ⚠️ as readme header declaring the models as invalid.
• Secondary output folder for all invalid models.
• Invalid models don't have 'view' links.
• Invalid models aren't pre-generated. Requires switch to generate as needed.

Continuation of the conversation in #482

[Steven Kopsa]

For now we've decided on creating a second folder structure for invalid models.

• Output
  • README.md (explanation of positive vs negative)
  • Positive
    • Modelgroup folders....
      • Validator Results (Per modelgroup raw output)
    • README.md (Validator results summary)
    • Manifest.json
  • Negative
    • Modelgroup folders....
      • Validator Results (Per modelgroup raw output)
    • README.md (Validator results summary)
    • Manifest.json