Added support for Lenovo Legion Slim 5 (16APH8)

Added PPD after researching the Framework laptops with AMD 7000 series

lenovo/legion/16aph8/README.md

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+I was unable to get the hybrid settings working well with lightdm or sddm, but Optimus Sync
+mode seems to work the best for me.
+
+I am running the Linux 6.6 LTS kernel with KDE + SDDM, and it seems to be working well.
+
+## hardware-configuration.nix
+
+I have the following customizations added for my nvidia drivers.
+
+```
+hardware.nvidia = {
+    nvidiaSettings = true;
+    package = config.boot.kernelPackages.nvidiaPackages.stable;
+};
+```
+
+## Setup at the time of testing
+
+### nix-info
+```
+$ nix-info -m
+ - system: `"x86_64-linux"`
+ - host os: `Linux 6.1.68, NixOS, 23.11 (Tapir), 23.11.20231220.d65bcea`
+ - multi-user?: `yes`
+ - sandbox: `yes`
+ - version: `nix-env (Nix) 2.18.1`
+ - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`
+```
+
+### lspci
+```
+$ lspci
+...
+01:00.0 VGA compatible controller: NVIDIA Corporation AD107M [GeForce RTX 4060 Max-Q / Mobile] (rev a1)
+...
+05:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Phoenix1 (rev c2)
+...
+```

lenovo/legion/16aph8/default.nix

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+{ lib, pkgs, ... }:
+
+{
+  imports = [
+    ../../../common/cpu/amd
+    ../../../common/cpu/amd/pstate.nix
+    ../../../common/gpu/amd
+    ../../../common/gpu/nvidia
+    ../../../common/pc/laptop
+    ../../../common/pc/laptop/ssd
+  ];
+
+  # Use latest LTS kernel for more Raphael fixes
+  boot = lib.mkMerge [
+    (lib.mkIf (lib.versionOlder pkgs.linux.version "6.6") {
+      kernelPackages = pkgs.linuxPackages_6_6;
+      kernelParams = ["amdgpu.sg_display=0"];
+    })
+  ];
+
+  hardware.nvidia = {
+      modesetting.enable = lib.mkDefault true;
+      powerManagement.enable = lib.mkDefault false;
+      powerManagement.finegrained = lib.mkDefault false;
+      open = lib.mkDefault false;
+      prime = {
+          sync.enable = lib.mkDefault true;
+          amdgpuBusId = "PCI:5:0:0";
+          nvidiaBusId = "PCI:1:0:0";
+      };
+  };
+
+  # AMD has better battery life with PPD over TLP:
+  # https://community.frame.work/t/responded-amd-7040-sleep-states/38101/13
+  services.power-profiles-daemon.enable = lib.mkDefault true;
+}