treewide: modules -> profiles, separate dirs, list in README (#29)

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.

supermicro/x10sll-f/default.nix

@@ -0,0 +1,14 @@
+{ config, pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    ipmitool
+  ];
+
+  boot.kernelModules = [ "jc42" "ipmi_devintf" "ipmi_si" "tpm_rng" ];
+
+  # services.cron.systemCronJobs = [
+  #   # Reset 5-minute watchdog timer every minute
+  #   "* * * * * ${pkgs.ipmitool}/bin/ipmitool raw 0x30 0x97 1 5"
+  # ];
+}