This adds basic support for the Thinkpad T440s, based on the work done for the T440p. The expression enables:

- microcode updates
- trackpoint support
- kernel module for battery level management

Enforce proper naming: all paths are lowercase and hyphen-separated,
if there's a line of models (aspire, macbook-pro, thinkpad) it becomes
a subdirectory. Documentation for profiles is moved to README files in
respective directories.

Add an Org mode table that lists all available profiles and their paths.

Instead of fetching repo locally, use a Nix channel. Making hardware
profiles read-only should improve quality and amount of participation
long-term.

Module for SuperMicro A1SRI-2758F