Switch to `uv` for project management #75

Job	Run time
test-run (3.9, py39, false, false)	25s
test-run (pypy3.9, py39, false, true)	1m 0s
test-run (3.10, py310, false, false)	29s
test-run (pypy3.10, pypy310, false, false)	53s
test-run (3.11, py311, false, false)	31s
test-run (pypy3.11, pypy311, false, false)	1m 1s
test-run (3.12, py312, false, false)	36s
test-run (3.13, py313, false, false)	32s
	5m 27s

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