Add/extend the core-im statementText property in Statement profiles

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The statementText property captures a human-readable free text expression of what a Statement is putting forth as true. e.g. for a VarPath statement, it might read:

“VariantX is causal for autosomal-dominant ConditionY with high penetrance, as mediated by its effects on GeneZ ‘.

This clearly expresses what a Statement data structure reports to be true, in plain language (so that it is unambiguous even if they do not understand SPOQ paradigm). And it provides a translation that reinforces / educates users on the SPOQ pattern for expressing Statement semantics.

This is not necessary of course, but IMO this is a valuable addition that achieves several benefits . . . might be a good to explore the utility/appetite for this early on, but including this property in Statement Profiles, and authoring 'templates' to help automatically generate the values of this property from the data (see comment below)

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Note that it would be simple to author templates for assembling these sentences using values of specific properties. e.g.

[subjectVariant] is causal for [modeOfInheritanceQualifier] [objectCondition] with [penetranceQualifier] penetrance, as mediated by its effects on the [geneContextQualifier] gene.

. . . which would give sentences like the example above.

Or, if direction and/or strength is provided:

This statement reports [strength] evidence/confidence [direction] the claim that [subjectVariant] is causal for [modeOfInheritanceQualifier] [objectCondition] with [penetranceQualifier] penetrance, as mediated by its effects on the [geneContextQualifier] gene.

. . . which would give sentences like:

"This statement reports moderate evidence supporting the claim that VariantX is causal for autosomal-dominant ConditionY with high penetrance, as mediated by its effects on GeneZ ".

A simple script could be written to instantiate these templates in the data, and/or in a user interface.