add TaggedExpression #3286

Job	Run time
Pylint	1m 26s
Ruff	5s
Conda Examples	1m 27s
Mypy	1m 29s
Conda Pytest (ubuntu-latest)	1m 28s
Conda Pytest with Intel CL	1m 24s
Conda Pytest (macos-latest)	1m 27s
Conda Pytest without arg check	1m 29s
Typos	4s
Documentation	1m 28s
Tests for downstream project Firedrake	1m 16s
Tests for downstream project arraycontext	1m 25s
Tests for downstream project meshmode	1m 26s
Conda Pytest Twice (for cache behavior)	1m 28s
Tests for downstream project grudge	1m 28s
Validate CITATION.cff	7s
Tests for downstream project pytential	1m 28s
Tests for downstream project pytato	1m 24s
	21m 49s

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