Refactor repo structure to prepare addition of a Rust recorder #24

Job	Run time
nix-tests	51s
Tests on ubuntu-latest (Python 3.12)	7s
Tests on ubuntu-latest (Python 3.11)	8s
Tests on ubuntu-latest (Python 3.10)	9s
Tests on macos-latest (Python 3.10)	12s
Tests on ubuntu-latest (Python 3.13)	10s
Tests on windows-latest (Python 3.13)	27s
Rust module smoke test on ubuntu-latest (Python 12)	32s
Tests on windows-latest (Python 3.12)	24s
Rust module smoke test on ubuntu-latest (Python 11)	27s
Rust module smoke test on ubuntu-latest (Python 10)	29s
Tests on windows-latest (Python 3.10)	33s
Tests on macos-latest (Python 3.12)	13s
Tests on windows-latest (Python 3.11)	28s
Rust module smoke test on ubuntu-latest (Python 13)	26s
Rust module smoke test on macos-latest (Python 11)	32s
Rust module smoke test on macos-latest (Python 10)	59s
Tests on macos-latest (Python 3.11)	16s
Tests on macos-latest (Python 3.13)	15s
Rust module smoke test on windows-latest (Python 10)	58s
Rust module smoke test on macos-latest (Python 12)	45s
Rust module smoke test on windows-latest (Python 13)	2m 15s
Rust module smoke test on windows-latest (Python 11)	1m 7s
Rust module smoke test on windows-latest (Python 12)	2m 6s
Rust module smoke test on macos-latest (Python 13)	32s
	15m 21s

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