Add Mfkey32 application (#2517)

* Add Mfkey32 application
* Fine tune RAM requirements, use FZ notification service API
* Fix PVS security warnings, fix issue with cracking keys on the FZ
* Prefer on-device or Flipper mobile app (seamless)
* Mfkey32: change app category to NFC
* Mfkey32: set target to f7 only
* Silence PVS false positives
* Correct PVS codes

Co-authored-by: あく <alleteam@gmail.com>

applications/external/mfkey32/application.fam

@@ -0,0 +1,17 @@
+App(
+    appid="mfkey32",
+    name="Mfkey32",
+    apptype=FlipperAppType.EXTERNAL,
+    targets=["f7"],
+    entry_point="mfkey32_main",
+    requires=[
+        "gui",
+        "storage",
+    ],
+    stack_size=1 * 1024,
+    fap_icon="mfkey.png",
+    fap_category="Nfc",
+    fap_author="noproto",
+    fap_icon_assets="images",
+    fap_weburl="https://github.com/noproto/FlipperMfkey",
+)

applications/main/nfc/scenes/nfc_scene_mfkey_complete.c

@@ -18,7 +18,7 @@ void nfc_scene_mfkey_complete_on_enter(void* context) {
         AlignCenter,
         AlignCenter,
         FontSecondary,
-        "Now use mfkey32v2\nto extract keys");
+        "Now use Mfkey32\nto extract keys");
     widget_add_button_element(
         nfc->widget, GuiButtonTypeCenter, "OK", nfc_scene_mfkey_complete_callback, nfc);
 
@@ -46,4 +46,4 @@ void nfc_scene_mfkey_complete_on_exit(void* context) {
     Nfc* nfc = context;
 
     widget_reset(nfc->widget);
-}
+}