chore: use git patches for patching the manufacturer name

Author: lockedmutex

branding.patch

@@ -0,0 +1,22 @@
+diff --git a/pico-keys-sdk/src/usb/usb_descriptors.c b/pico-keys-sdk/src/usb/usb_descriptors.c
+index c44b3e2..f2f2734 100644
+--- a/pico-keys-sdk/src/usb/usb_descriptors.c
++++ b/pico-keys-sdk/src/usb/usb_descriptors.c
+@@ -214,7 +214,7 @@ enum
+   VENDOR_REQUEST_WEBUSB = 1,
+   VENDOR_REQUEST_MICROSOFT = 2
+ };
+-#define URL  "www.picokeys.com"
++#define URL  "www.github.com/librekeys"
+ static bool web_serial_connected = false;
+ 
+ const tusb_desc_webusb_url_t desc_url =
+@@ -318,7 +318,7 @@ uint8_t const *tud_descriptor_bos_cb(void) {
+ // array of pointer to string descriptors
+ char const *string_desc_arr [] = {
+     (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409)
+-    "Pol Henarejos",                     // 1: Manufacturer
++    "Libre Keys",                      // 1: Manufacturer
+     "Pico Key",                       // 2: Product
+     "11223344",                      // 3: Serials, should use chip ID
+     "Config"               // 4: Vendor Interface

default.nix

@@ -41,6 +41,10 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     hash = "sha256-a2edwKskmOKMy34xsD29OW/TlfHCn5PtUKDliDGUXi8=";
   };
 
+  patches = [
+    ./branding.patch
+  ];
+
   strictDeps = true;
 
   nativeBuildInputs = [
@@ -57,12 +61,6 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     find . -name "*.cmake" -o -name "CMakeLists.txt" -print0 | xargs -0 sed -i 's/git submodule update/echo "Nix: Skipped git submodule update"/g'
     find . -name "*.cmake" -o -name "CMakeLists.txt" -print0 | xargs -0 sed -i 's/git checkout/echo "Nix: Skipped git checkout"/g'
 
-    echo "--- Patching: Applying Libre Keys Branding ---"
-    # 1. Change Manufacturer Name
-    sed -i 's/"Pol Henarejos"/"Libre Keys"/g' pico-keys-sdk/src/usb/usb_descriptors.c
-    # 2. Change URL
-    sed -i 's|"www.picokeys.com"|"www.github.com/librekeys/picoforge"|g' pico-keys-sdk/src/usb/usb_descriptors.c
-
     ${lib.optionalString eddsa ''
       echo "--- Patching: Injecting EdDSA mbedtls fork (eddsa=true) ---"
       rm -rf pico-keys-sdk/mbedtls