Docs: Added missing `lang/contexts.json` file for translation service. Closes #40.
@@ -0,0 +1,6 @@
+{
+ "Media URL": "Label for the URL input in the Media Embed URL editing balloon.",
+ "The URL must not be empty.": "An error message that informs about an empty value in the URL input.",
+ "This media URL is not supported.": "An error message that informs about not supported media.",
+ "Insert media": "Toolbar button tooltip for the Media Embed feature."
+}