feat(clipboard): support readImage & writeImage (#845)

* feat(clipboard): support `read_image` & `write_image`

* fix plugin name

* platform specific bahavior

* remove unnecessary BufWriter

* improvement

* update example

* update example

* format

* header, fix change file

* use image from tauri

* fix ci

* update tauri, fix read

* image crate only on desktop [skip ci]

* Update plugins/authenticator/src/u2f_crate/protocol.rs [skip ci]

Co-authored-by: Amr Bashir <amr.bashir2015@gmail.com>

* Update plugins/authenticator/src/u2f_crate/protocol.rs [skip ci]

Co-authored-by: Amr Bashir <amr.bashir2015@gmail.com>

* update deps, address code review

* fix mobile [skip ci]

---------

Co-authored-by: Lucas Nogueira <lucas@tauri.studio>
Co-authored-by: Lucas Nogueira <lucas@tauri.app>
Co-authored-by: Amr Bashir <amr.bashir2015@gmail.com>

plugins/process/package.json

@@ -23,6 +23,6 @@
     "LICENSE"
   ],
   "dependencies": {
-    "@tauri-apps/api": "2.0.0-beta.4"
+    "@tauri-apps/api": "2.0.0-beta.6"
   }
 }

plugins/process/permissions/schemas/schema.json

@@ -139,14 +139,10 @@
         },
         "platforms": {
           "description": "Target platforms this permission applies. By default all platforms are affected by this permission.",
-          "default": [
-            "linux",
-            "macOS",
-            "windows",
-            "android",
-            "iOS"
+          "type": [
+            "array",
+            "null"
           ],
-          "type": "array",
           "items": {
             "$ref": "#/definitions/Target"
           }