refactor(a32nx): port legacy fms/mcdu to typescript

[tracernz]

Fixes #[issue_no]

Summary of Changes

The "refactor" commits are adding/changing/fixing types, while the "fix" commits are fixing actual bugs found through adding types.

Screenshots (if necessary)

References

Additional context

Discord username (if different from GitHub):

Testing instructions

Perform full flights primarily in A32NX, but also smoke test A380X due to FMS commonality. Test CLOSEST AIRPORTS page in the A32NX (under DATA page), as it's been rewritten.

How to download the PR for QA

Every new commit to this PR will cause new A32NX and A380X artifacts to be created, built, and uploaded.

1. Make sure you are signed in to GitHub
2. Click on the Checks tab on the PR
3. On the left side, find and click on the PR Build tab
4. Click on either flybywire-aircraft-a320-neo, flybywire-aircraft-a380-842 (4K) or flybywire-aircraft-a380-842 (8K) download link at the bottom of the page

[heclak]

still in progress with a flight but I found an issue with the fix info page.

MSFS2024 SU1 Beta
A32NX

Repro steps:

1. Go to fix info page
2. Enter a fix name into 1L LSK. Page changes to the one shown below. I can press CLR and 1L LSK to "delete" the fix name and return to the blank fix info page.

[tracernz]

Thanks. Possibly missed something when rebasing after the fix info merge.

[tracernz]

Fixed. Some or all of this is broken on master too; now fixed here.

[heclak]

Quality Assurance Tester/Trainee Report

Discord Username : Heclak
Object of testing : #9823
Aircraft : A32NX
Tier of Testing : 2
Date : 03/02/2025

Testing Process:
Did a full flight from SBSP to SBRJ. Used the standard MCDU pages and clicked through the other pages to check for broken pages.

Testing Results:
Passed

Conclusions:
No broken pages were observed. Checked closest airports page and it looked fine. Fix info page is now working correctly.

Media:

[tracernz]

I've completed a few flights, and drilled into a lot of spots I'd normally never or rarely go in the MCDU to try some things out. I fixed a small bug with the NAV RADIO page not re-drawing after tuning an ILS, but otherwise all seems good. I'll merge it, and address anything that comes up in the next few days, as no doubt people will think of things we will never think to test.

Playing with CLOSEST AIRPORTS while in cruise: