fix(store): remove Android and iOS plugins, closes #1256 (#1695)

The Android and iOS support introduced on #1011 is not really supported - the Tauri path API correctly resolves the cache directory on mobile, and we can access those directly using Rust code.

This is a breaking change because we no longer uses the same directory to store the files - app_cache_dir returns a different location

examples/api/src-tauri/capabilities/base.json

@@ -78,6 +78,11 @@
         }
       ],
       "deny": ["$APPDATA/db/*.stronghold"]
-    }
+    },
+    "store:allow-entries",
+    "store:allow-get",
+    "store:allow-set",
+    "store:allow-save",
+    "store:allow-load"
   ]
 }