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Support DuckDB syntax: FROM-first, SEMI/ANTI joins, COPY, ATTACH, MAC… #891

Job	Run time
Grammar Choice Conflicts	50s
Gradle Check (windows-latest)	4m 34s
Gradle Check (macos-latest)	4m 5s
Gradle Check (ubuntu-latest)	3m 40s
Maven Verify (windows-latest)	5m 1s
Maven Verify (ubuntu-latest)	2m 39s
Maven Verify (macos-latest)	3m 41s
Gradle Publish (Maven Central)	3m 25s
Build & Deploy Sphinx Docs	2m 25s
	30m 20s