ENH: rework known reparameterisations and support plugins #1135

Job	Run time
Integration tests - Python 3.9 (macOS)	3m 33s
Integration tests - Python 3.10 (macOS)	4m 22s
Integration tests - Python 3.11 (macOS)	3m 20s
Integration tests - Python 3.12 (macOS)	4m 9s
Integration tests - Python 3.9 (Ubuntu)	5m 17s
Integration tests - Python 3.10 (Ubuntu)	5m 27s
Integration tests - Python 3.11 (Ubuntu)	5m 22s
Integration tests - Python 3.12 (Ubuntu)	4m 53s
Integration tests - Python 3.9 (Windows)	9m 20s
Integration tests - Python 3.10 (Windows)	10m 40s
Integration tests - Python 3.11 (Windows)	10m 8s
Integration tests - Python 3.12 (Windows)	9m 19s
	1h 15m 50s

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