Complete memory graph and document value workplans

examples/functions/typed-values.md

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+# Typed Document Function Values
+
+String value: {{mkt:text.upper "draft"}}
+
+Markdown value:
+
+```mkt-function md.heading level=3
+Typed Section
+```
+
+Dynamic context values can map lists, records, dictionaries, and tables through
+the typed value mapper when supplied by an embedding application.