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Support the rest of DuckDB's CREATE MACRO syntax #1229

Job	Run time
Gradle Check (macos-latest)	4m 13s
Gradle Check (windows-latest)	4m 54s
Gradle Check (ubuntu-latest)	3m 28s
Grammar Choice Conflicts	35s
Maven Verify (macos-latest)	6m 24s
Maven Verify (windows-latest)	5m 7s
Maven Verify (ubuntu-latest)	3m 19s
Gradle Publish (Maven Central)	-1s
Build & Deploy Sphinx Docs	-1s
	27m 58s