Show escaped values for non-textblock facts

[brettkail-wk]

Reason for change

Ideally, text block facts should always be parsed and rendered as HTML, and non-text-block concept types should always be rendered literally. We correctly only show rendered HTML for text block facts, but we incorrectly unescape non-text-block values when rendering the value inline.

Description of change

The readable value of a fact should be based on whether it's a text block, not whether it's escaped.

Steps to Test

The facts in p-2024-03-14-en.zip are using stringItemType and should be rendered as a&b and c&d, not a&b and c&d.

review: @Arelle/arelle @paulwarren-wk

[aviary3-wk]

Security Insights

No security relevant content was detected by automated scans.

Action Items

• Review PR for security impact; comment "security review required" if needed or unsure

• Verify aviary.yaml coverage of security relevant code

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