framework: Add Laptop 13 Intel Core Ultra Series 3

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

framework/13-inch/intel-core-ultra-series3/README.md

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+# [Framework Laptop 13](https://frame.work/laptop13pro)
+
+## 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.Laptop.PTL.BIOS.firmware)

framework/13-inch/intel-core-ultra-series3/default.nix

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+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+{
+  imports = [
+    ../common
+    ../common/intel.nix
+  ];
+
+  # Everything is updateable through fwupd
+  services.fwupd.enable = true;
+}