[IMP] sales: add pricelist to loyalty prgms

[ksc-odoo]

This PR is focused on adding important/updated information about how Loyalty Programs can be applied to a specific Pricelist in v17 -- as detailed in the most recent release notes. (this PR was requested by VPD)

It also updates/adds necessary screenshots, updates some definitions, and reorganizes some elements to be in the same order they appear on the UI for easier readability. It also adds a necessary mention about the addition of the Start and End Date fields that are now present on the program form.

PROJECT TASK: https://www.odoo.com/odoo/project/3835/tasks/4033461?cids=3

[robodoo]

[ksc-odoo]

Hey, @larm-odoo -- this one is ready for a Peer Review from you whenever you get a chance. Thanks! 👍

[ksc-odoo]

Thanks for the always helpful feedback, @larm-odoo -- I made the necessary adjustments, and believe this one is now ready for Final Review, @StraubCreative 👍 (whenever you get a chance)

[StraubCreative]

Fresh rebase on 7276e13 to fix ci/codeowner_coverage error

[ksc-odoo]

After giving this another pass (per our discussion), I believe this one is now "officially" ready for a Final Review, @StraubCreative (whenever you get a chance). Thanks! 🙏