Refactor FOV and pathfinding samples #970

Job	Run time
mypy	23s
ruff	9s
sdist	2m 33s
tox (windows-latest)	2m 17s
tox (ubuntu-latest)	2m 33s
test-docs	1m 54s
parse_sdl (windows-latest, 2.0.14)	47s
parse_sdl (macos-latest, 2.0.14)	23s
parse_sdl (windows-latest, 2.30.0)	35s
parse_sdl (windows-latest, 2.0.16)	38s
parse_sdl (macos-latest, 2.30.0)	24s
build-macos (cp38-*_universal2)	5m 4s
build-macos (pp38-*)	3m 34s
build (windows-latest, 3.8, x64)	3m 44s
build (windows-latest, pypy-3.8, x64)	4m 39s
parse_sdl (macos-latest, 2.0.16)	23s
build (ubuntu-latest, 3.8, x64)	3m 5s
build (windows-latest, 3.8, x86)	3m 45s
build (ubuntu-latest, pypy-3.8, x64)	3m 5s
linux-wheels (x86_64, pp38-manylinux*)	1m 55s
linux-wheels (aarch64, cp38-manylinux*)	12m 21s
build (windows-latest, pypy-3.8, x86)	4m 15s
linux-wheels (x86_64, cp38-manylinux*)	1m 53s
linux-wheels (aarch64, pp38-manylinux*)	11m 2s
publish	0s
	1h 11m 21s

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