Refactor FOV and pathfinding samples #971

Job	Run time
mypy	22s
ruff	5s
sdist	39s
tox (windows-latest)	2m 12s
tox (ubuntu-latest)	1m 41s
test-docs	1m 35s
parse_sdl (windows-latest, 2.0.14)	33s
parse_sdl (windows-latest, 2.0.16)	33s
parse_sdl (windows-latest, 2.30.0)	44s
parse_sdl (macos-latest, 2.30.0)	18s
parse_sdl (macos-latest, 2.0.14)	23s
build (ubuntu-latest, 3.8, x64)	3m 10s
parse_sdl (macos-latest, 2.0.16)	18s
linux-wheels (x86_64, cp38-manylinux*)	1m 55s
linux-wheels (x86_64, pp38-manylinux*)	1m 58s
build (ubuntu-latest, pypy-3.8, x64)	2m 57s
linux-wheels (aarch64, pp38-manylinux*)	11m 9s
linux-wheels (aarch64, cp38-manylinux*)	12m 31s
build (windows-latest, 3.8, x64)	3m 41s
build (windows-latest, pypy-3.8, x86)	4m 38s
build (windows-latest, pypy-3.8, x64)	4m 40s
build (windows-latest, 3.8, x86)	4m 8s
build-macos (pp38-*)	4m 1s
build-macos (cp38-*_universal2)	4m 50s
publish	0s
	1h 9m 1s

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