Add common options reference to wp option documentation (#581)

Co-authored-by: swissspidy <841956+swissspidy@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Pascal Birchler <pascalb@google.com>

Author: Copilot

src/Option_Command.php

@@ -9,6 +9,21 @@
  *
  * See the [Plugin Settings API](https://developer.wordpress.org/plugins/settings/settings-api/) and the [Theme Options](https://developer.wordpress.org/themes/customize-api/) for more information on adding customized options.
  *
+ * ## COMMON OPTIONS
+ *
+ * These are some of the most commonly used WordPress options:
+ *
+ * * `siteurl` - Site URL, e.g. http://example.com
+ * * `blogname` - Site title
+ * * `blogdescription` - Site tagline
+ * * `admin_email` - Administration email address
+ * * `default_role` - Default role for new users
+ * * `timezone_string` - Local timezone, e.g. "America/New_York"
+ * * `home` - Home URL, e.g. http://example.com
+ * * `blog_public` - Discourage search engines when set to 0
+ *
+ * For the full list of available options, see the [Option Reference](https://developer.wordpress.org/apis/options/).
+ *
  * ## EXAMPLES
  *
  *     # Get site URL.