Add Framework Laptop 16 AMD AI 300 Series

Signed-off-by: Daniel Schaefer <dhs@frame.work>

framework/16-inch/amd-ai-300-series/README.md

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+# [Framework Laptop 16 AMD AI 300 Series](https://frame.work/)
+
+## nvidia
+
+If you have an nvidia dGPU module, you can enable it via the nvidia open drivers:
+
+```
+services.xserver.videoDrivers = [ "nvidia" ];
+hardware.nvidia.open = true;  # see the note above
+```
+
+See also [NVIDIA](https://wiki.nixos.org/wiki/NVIDIA) on the NixOS Wiki.
+
+## Updating Firmware
+
+Everything is updateable through fwupd, so it's enabled by default.
+
+To get the latest firmware, run:
+
+```sh
+$ fwupdmgr refresh
+$ fwupdmgr update
+```
+
+- [Latest Update](https://fwupd.org/lvfs/devices/work.frame.Laptop16.RyzenAI300.BIOS.firmware)

framework/16-inch/amd-ai-300-series/default.nix

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+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [
+    ../common
+    ../common/amd.nix
+  ];
+
+  # 6.14 is the minimum recommended kernel, 6.15 has many useful changes, too
+  boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "6.15") (
+    lib.mkDefault pkgs.linuxPackages_latest
+  );
+
+  # Everything is updateable through fwupd
+  services.fwupd.enable = true;
+}