fix(a380x/air cond): default start state of air cond system

[mjuhe]

Summary of Changes

A380X only.

This PR improves the start state of the air conditioning system, essentially just changing the overhead temperature knobs to match standard procedures. It also adds the ability to select PURS SEL for the cabin temperature. This can later be added in the EFB (using LVar A32NX_COND_PURS_SEL_TEMPERATURE) to simulate flight attendants controlling the cabin temperature via the FAP. At the moment this LVar is set to 24 degrees.

It also adds a fix for the airflow determination when the number of passengers is still not entered in the FMS. Now it is adjusted for the maximum number of passengers (minimum before).

Screenshots (if necessary)

References

Additional context

Discord username (if different from GitHub): Commander Ga

Testing instructions

Check that the initial state of the overhead panel matches the screenshot above in all possible starting states.

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, click on the bottom PR tab
4. Click on either flybywire-aircraft-a320-neo or flybywire-aircraft-a380-842 download link at the bottom of the page