[FL-2677] SubGhz: region provisioning (#1574)

* FuriHal: region HAL draft
* FuriHal,SubGhz: complete region provisioning.
* Rpc: fix null pointer dereference.
* Cli: device info formatting
* FuriHal: region provisioning fixes and documentation.

applications/loader/application.fam

@@ -5,6 +5,6 @@ App(
     entry_point="loader_srv",
     cdefines=["SRV_LOADER"],
     requires=["gui"],
-    stack_size=1 * 1024,
+    stack_size=2 * 1024,
     order=90,
 )