Picopass: factory key support, app rename and move to NFC category, minor code cleanup (#2417)

* message on successful card write
* auth using factory key
* auth using factory default
* factory default screen
* write standard iclass key
* pass block explicitly
* Fix array indexing, add empty detection
* PicoPass: rename app and move to NFC group, minor code cleanup

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

applications/plugins/picopass/application.fam

@@ -1,6 +1,6 @@
 App(
     appid="picopass",
-    name="PicoPass Reader",
+    name="PicoPass",
     apptype=FlipperAppType.EXTERNAL,
     targets=["f7"],
     entry_point="picopass_app",
@@ -11,7 +11,7 @@ App(
     stack_size=4 * 1024,
     order=30,
     fap_icon="125_10px.png",
-    fap_category="Tools",
+    fap_category="NFC",
     fap_libs=["mbedtls"],
     fap_private_libs=[
         Lib(