Auto PR: assertion_evidence.yaml generated from google spreadsheets using schemasheets

[puja-trivedi]

This PR adds a autogenerated assertion_evidence.yaml file.

[tekrajchhetri]

Thanks @puja-trivedi for this. I observed the following.

1. Disconnected class. Please note that these disconnected class should connect to Assertion. We could use properties, has_significance_level and has_significance (or significance_type).

2. The assertion class should be connected to document and platform class with property is_expressed_in, which is not the case. Currently, it is connect with Thing class.

Expected:

Current:

Rest looks good to me and we can merge and this is our V1 draft.

[puja-trivedi]

• Issue 1 - Disconnected class (resolved in PR#127)
• Issue 2 - Assertion,Document,Platform (this is an issue with the visualization tool; nothing to fix in the model)