v0.12

Pre-release for testing before promoting these changes to a stable release.

Highlights:

• Replace the PyGObject/GLib and dbus-python runtime path with dbus-next and asyncio.
• Add a local Debian package builder and attach a systemd-enabled .deb artifact.
• Port robustness fixes from PR #394.
• Add reported CPU IDs for recent Intel platforms.
• Fix --help on newer Python versions and avoid reading power-limit units when PL1/PL2 are disabled.

Debian package:

• Asset: throttled_0.12_all.deb
• SHA256: 0a2d7add4bfb47f641cd57e1474523530291e9f5b3796f60a69f306e05031f30