docs(angular.copy): list object types / features that are not supported

Closes angular#5085
Closes angular#13193
Closes angular#14352
Closes angular#15904
Closes angular#16055
Closes angular#16061
Closes angular#16067

Author: Narretz

src/Angular.js

@@ -783,7 +783,9 @@ function arrayRemove(array, value) {
  * @kind function
  *
  * @description
- * Creates a deep copy of `source`, which should be an object or an array.
+ * Creates a deep copy of `source`, which should be an object or an array. This functions is used
+ * internally, mostly in the change-detection code. It is not intended as an all-purpose copy
+ * functions, and has several limitations (see below).
  *
  * * If no destination is supplied, a copy of the object or array is created.
  * * If a destination is provided, all of its elements (for arrays) or properties (for objects)
@@ -803,6 +805,16 @@ function arrayRemove(array, value) {
  *   developers responsibility to make sure they are compatible.
  * </div>
  *
+ * @knownIssue
+ * This is a list of (known) object types / features that are not handled correctly by this function:
+ * - [`ImageData`](https://developer.mozilla.org/docs/Web/API/File)
+ * - [`Map`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Map)
+ * - [`ImageData`](https://developer.mozilla.org/docs/Web/API/ImageData)
+ * - [`MediaStream`](https://developer.mozilla.org/docs/Web/API/MediaStream)
+ * - [`WeakMap`](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/WeakMap)
+ * - ['getter'](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/get)/
+ *   [`setter`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/set)`
+ *
  * @param {*} source The source that will be used to make a copy. Can be any type, including
  *     primitives, `null`, and `undefined`.
  * @param {(Object|Array)=} destination Destination into which the source is copied. If provided,