Add stats admin settings screen

[pgk]

Fixes #2729

Changes Proposed in this Pull Request

• Introduces the stats admin settings screeen. Defaults to stats not being enabled.

Testing Instructions

• Visit the admin settings of job manager. You can see the stats section.
• Test they save correctly.
• Any thoughts on the labels etc...

Release Notes

• N/A

New or Updated Hooks and Templates

• N/A

Deprecated Code

• N/A

Screenshot / Video

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[yscik]

• Would it make sense to enable stat collection, but have a separate option to disable stats on the frontend for employers?
• The Require paid listings might not make it into the first iteration, and the Paid listings addon should be adding it
• Date range wise I'm looking into showing stats for the whole listing duration, that sounds the most useful for employers.
• Retention wise, we probably want to control this. Job listings stats we'd delete when the listing is deleted, and global sites stats site owners would likely want to see for years (which we'd archive monthly.)

[pgk]

• Would it make sense to enable stat collection, but have a separate option to disable stats on the frontend for employers?

Hmmm maybe yes!

* The Require paid listings might not make it into the first iteration, and the Paid listings addon should be adding it

Noted, and removed.

* Date range wise I'm looking into showing stats for the whole listing duration, that sounds the most useful for employers.

How would we codify that? Something like a select box with options? Or hard-rule?

* Retention wise, we probably want to control this. Job listings stats we'd delete when the listing is deleted, and global sites stats site owners would likely want to see for years (which we'd archive monthly.)

Sounds good.

I am merging it and we can figure out the date-range and retention in subsequent prs.