Tests

feat: Generalize `autogram.Engine` (non-batched) #1622

Job	Run time
Run mypy	1m 4s
Build doc	44s
Run (most) tests with default install	1m 31s
Run tests with full install (3.10, macOS-latest)	58s
Run tests with full install (3.11, ubuntu-latest)	1m 35s
Run tests with full install (3.10, ubuntu-latest)	1m 39s
Run tests with full install (3.10, windows-latest)	2m 2s
Run tests with full install (3.12, macOS-latest)	57s
Run tests with full install (3.12, ubuntu-latest)	1m 36s
Run tests with full install (3.11, windows-latest)	1m 51s
Run tests with full install (3.13, ubuntu-latest)	1m 35s
Run tests with full install (3.11, macOS-latest)	1m 26s
Run tests with full install (3.12, windows-latest)	1m 49s
Run tests with full install (3.13, macOS-latest)	1m 9s
Run tests with full install (3.13, windows-latest)	2m 11s
	22m 7s

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