chore(#9577): clean up and organize page-object files from /common folder

[tatilepizs]

Description

clean up and organize page-object files from /common folder

9577

Code review checklist

• [ ] Readable: Concise, well named, follows the style guide, documented if necessary.
• [ ] Documented: Configuration and user documentation on cht-docs
• [ ] Tested: Unit and/or e2e where appropriate
• [ ] Internationalised: All user facing text
• [ ] Backwards compatible: Works with existing data and configuration or includes a migration. Any breaking changes documented in the release notes.

Compose URLs

If Build CI hasn't passed, these may 404:

• Core
• CouchDB Single
• CouchDB Cluster

License

The software is provided under AGPL-3.0. Contributions to this project are accepted under the same license.

[lorerod]

Hey @tatilepizs, I see that both Jenni and Ani have reviewed this PR, and their feedback has been addressed. I think the coverage looks solid, so I’ll be stepping back. Let me know if you need anything else from my end—great work!