This change updates the Automation plugin to make use of the `use_new_show_route` plugin flag, as well as generally updating the UI to match current admin UI guidelines. Notable changes include:
- Moving template/router/controller files to make use of the `admin.adminPlugins.show` route.
- Changing the URIs from `/admin/plugins/discourse-automation` to `/admin/plugins/automation`, to match the `PLUGIN_NAME`.
- Adding UI wrappers around the New/Edit forms, and polishing the list of defined automations.
This page object also attempts to make the update automation more resilient as we are seeing flakey specs on this codepath. The solution for now is to ensure we have the sequence: click button/button is loading/ button has finished loading.
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Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com>
