Revert "chore: remove windows/osx from plugin.xml (apache#850)"

This reverts commit 0796f78.

plugin.xml

@@ -136,4 +136,36 @@
         </js-module>
     </platform>
 
+    <!-- windows -->
+    <platform name="windows">
+        <config-file target="package.appxmanifest" parent="/Package/Capabilities">
+            <DeviceCapability Name="webcam" />
+        </config-file>
+        <js-module src="www/CameraPopoverHandle.js" name="CameraPopoverHandle">
+            <clobbers target="CameraPopoverHandle" />
+        </js-module>
+        <js-module src="src/windows/CameraProxy.js" name="CameraProxy">
+            <runs />
+        </js-module>
+    </platform>
+
+    <!-- osx -->
+    <platform name="osx">
+        <config-file target="config.xml" parent="/*">
+            <feature name="Camera">
+                <param name="osx-package" value="CDVCamera"/>
+            </feature>
+        </config-file>
+
+        <js-module src="www/CameraPopoverHandle.js" name="CameraPopoverHandle">
+            <clobbers target="CameraPopoverHandle" />
+        </js-module>
+
+        <header-file src="src/osx/CDVCamera.h" />
+        <source-file src="src/osx/CDVCamera.m" />
+
+        <framework src="Quartz.framework" />
+        <framework src="AppKit.framework" />
+    </platform>
+
 </plugin>