Add EfficientDiD estimator (Chen, Sant'Anna & Xie 2025) #345

Job	Run time
Pure Python Fallback	51m 41s
Rust Unit Tests (ubuntu-latest)	1m 18s
Rust Unit Tests (windows-latest)	2m 21s
Rust Unit Tests (macos-latest)	1m 44s
Python Tests (ubuntu-latest, py3.13)	9m 20s
Python Tests (macos-latest, py3.13)	5m 41s
Python Tests (macos-latest, py3.11)	5m 24s
Python Tests (windows-latest, py3.13)	9m 36s
Python Tests (windows-latest, py3.11)	9m 50s
Python Tests (ubuntu-latest, py3.11)	9m 13s
	1h 46m 8s

Provide feedback