Upgrade python, av, pyyaml, pillow, and numpy

[aentwist]

Minimum (first commit): fix av, min python from 3.7 to 3.8

• Upgrade av to >=11 since 9 and 10 have cython 3 issues
• av 9->11 drops python 3.7 support and adds python 3.11, 3.12 support. Since av 12 has the same python version support as av 11, we may as well just go all the way to 12 because that's current
• => We must upgrade python min version to 3.8

More (second commit): max python from 3.10 to 3.12

• We note that the max possible python version might have increased since the av-imposed 3.10 limit is removed
• -> Try removing the max version
• PySide6 wants max 3.12, so add that max (<3.13). This upgrades PySide6 in lockfile (minor versions, but the versioning is a little odd).
• pyyaml, required by myst-parser, has a cython 3 issue with 6.0.0 that was patched in 6.0.1. Upgrade in lockfile to 6.0.1 (patch version).
• pillow, required by adbutils, wants v10 for some reason. This upgrade spans a major version, I don't think we hit any breaking changes. See pillow 9->10 breaking changes to review. Maybe it has to do with the PySide6 upgrade, or (probably) the python one.
• numpy also wants an upgrade. Upgrade in lockfile (minor versions).

After all this nonsense, pytest passes and poetry build works (on WSL Debian and Windows). The local scrcpy-client also works for my project where the one on pypi failed. No further testing has been done. Note that this was my first time ever using poetry. I do not see a project python version. First commit tested on python 3.10.14. Second commit tested on python 3.12.3 (current). Please feel free to test further however you usually might.

Closes #59