feat(runtime): Add capture attribute on Open File Picker node (#57)

- https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#capture
- https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/capture

packages/noodl-viewer-react/src/nodes/std-library/openfilepicker.js

@@ -43,6 +43,10 @@ const OpenFilePicker = {
 
         input.accept = this._internal.acceptedFileTypes;
 
+        if (this._internal.capture) {
+          input.capture = this._internal.capture;
+        }
+
         input.onchange = onChange;
         input.click();
       }
@@ -54,6 +58,14 @@ const OpenFilePicker = {
       set(value) {
         this._internal.acceptedFileTypes = value;
       }
+    },
+    capture: {
+      group: 'General',
+      type: 'string',
+      displayName: 'Capture',
+      set(value) {
+        this._internal.capture = value;
+      }
     }
   },
   outputs: {