Added deterministic function layer

examples/functions/basic-functions.md

@@ -0,0 +1,15 @@
+# Basic Document Functions
+
+Status: {{mkt:text.upper "draft"}}
+
+{{mkt:md.bold "Important"}} sections can use inline functions.
+
+Pipeline result: {{mkt:text.upper "draft" | text.replace DRAFT Final}}
+
+```mkt-function md.heading level=2
+Generated Section
+```
+
+```mkt-function md.codeblock lang=python
+print("hello from a deterministic function")
+```