Drop moment.js for luxon.js

[yubiuser]

What does this PR aim to accomplish?:

This PR initially only tried to replace https://github.com/dangrossman/daterangepicker which has been unmaintained for >5 years now. I found a active fork at https://github.com/Wernfried/daterangepicker which had the nice side effect that it replaced moment.js (also in maintenance mode) mode with its successor luxon (https://moment.github.io/luxon). I swapped all the libraries and adjusted the code. Not all date/time format could be translated 1:1 but it's close.

It was quite straight forward, but one moment.js function (toHuman()) did not work in luxon.js (with millisecond input it would not translate to human readable output but keep in miliseconds). There is a long-standing luxon bug (moment/luxon#1134) which provided a nice workaround with a wrapper function. I added it, but it required to load luxon.js already in header.lp (opposed to header_authenticated).

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[yubiuser]

Ready for review and testing

[yubiuser]

I did not implement any of the new features https://github.com/Wernfried/daterangepicker would offer. This could be implemented in a follow-up PR.

[Copilot]

Pull Request Overview

This pull request replaces the Moment.js library with Luxon for date/time handling in the Pi-hole Web Interface. The change includes updating Chart.js adapters and removing source map files for vendor libraries.

Key Changes

• Library Migration: Replaces Moment.js with Luxon for date/time operations
• Chart.js Adapter Update: Switches from chartjs-adapter-moment to chartjs-adapter-luxon
• Source Map Cleanup: Removes source map files for moment.js, daterangepicker, and chartjs-adapter-moment

Reviewed Changes

Copilot reviewed 7 out of 18 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
vendor/moment/*	Removes all Moment.js library files (JS and map files)
vendor/chartjs-adapter-moment/*	Removes Moment.js-based Chart.js adapter files
vendor/chartjs-adapter-luxon/chartjs-adapter-luxon.umd.min.js	Adds Luxon-based Chart.js adapter (new file)
vendor/daterangepicker/*.map	Removes source map files for daterangepicker
vendor/daterangepicker/daterangepicker.min.css	Adds jsDelivr CDN attribution header
scripts/lua/header.lp	Adds luxon.min.js script include
scripts/lua/header_authenticated.lp	Replaces moment.js and chartjs-adapter-moment with chartjs-adapter-luxon

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[PromoFaux]

While using this PR as a base for implementing the new constrained "All Time" range, I found a bug in the daterangepicker fork, and have submitted a PR upstream to get it fixed

https://github.com/Wernfried/daterangepicker/pull/1/files

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.