Raised for testing purpose - Contains all code of GSoC 2024

[omChauhanDev]

What this PR does

This pr is created for testing all training modification features.
Eg: how they work over production server

[ragesoss]

This is an impressive set of functionality.

I've done some initial testing, and there are a few UX problems that I think will need to be fixed before this is ready to deploy.

• There needs to be a way to edit an existing slide. Since we are not supporting slide deletion, it's important to be able to change the wiki page for an existing slide, so that misconfiguring a new slide will not render the slide slug unusable.
• The wiki page field should automatically handle input that is a meta.wikimedia.org full URL instead of just a page name. Copying and pasting the full URL from a wiki is a common pattern in the dashboard, and it's not obvious whether a user ought to use a URL or just a page title.

[ragesoss]

I also encountered a JS error when entering 'reorder' mode on an existing module's index page:

TypeError: Cannot read properties of null (reading 'split')
    at DraggableSlide (draggableSlide.jsx:68:1)
    at renderWithHooks (react-dom.development.js:16305:18)
    at mountIndeterminateComponent (react-dom.development.js:20069:13)
    at beginWork (react-dom.development.js:21582:16)
    at beginWork$1 (react-dom.development.js:27421:14)
    at performUnitOfWork (react-dom.development.js:26552:12)
    at workLoopSync (react-dom.development.js:26461:5)
    at renderRootSync (react-dom.development.js:26429:7)
    at recoverFromConcurrentError (react-dom.development.js:25845:20)
    at performSyncWorkOnRoot (react-dom.development.js:26091:20)
    at flushSyncCallbacks (react-dom.development.js:12042:22)
    at eval (react-dom.development.js:25646:13)

[omChauhanDev]

Fixing this error and also reducing some unnecessary lines of code of 'reordering slides' pr. Then will move on to incorporating the listed changes to make it perfect for deployment.

[omChauhanDev]

sir, where you found this error as, I tried replicating this error in my browser console but found nothing
kindly have a look : Video

[omChauhanDev]

@ragesoss sir, kindly have a look

[ragesoss]

Hmm... I still hit that same error. I'm doing this in wiki_education mode, with freshly reloaded training modules, and any time I click 'Change Order' on the index page of one of the YAML-backed modules, it throws a JS error and the React-rendered sidebar disappears.