fix(fmgc): multiple FMGC fixes and small additions

[lukecologne]

Fixes #9661

Summary of Changes

This PR adds some small fixes for the FMGC mode logic:

• Use correct bits for the EXP CLB/DES mode sync, and add EXP bits to the CLB/DES mode sync. This prevents incorrect mode switching or reversions when changing the master FMGC while EXP CLB/DES is engaged.
• Reset all engaged modes at engine start, to ensure a consistent configuration for takeoff if any modes were engaged when the engines were not yet started.
• Fix triple click sounding when entering global speed protection (FD auto deactivation), even when no FD was engaged
• CAT 1 capability is now shown instead of CAT 2 when no RA indicates NO
• Re-add support for the A32NX_FG_RNAV_APP_SELECTED LVar
• Fix missing abs() in the NAV capture condition
• Raise default RA value (when both RAs are FW) to 2500ft, to enable LOC arming

Screenshots (if necessary)

References

Additional context

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[lukecologne]

Converting to draft as there as some more changes I want to bring in

[tracernz]

It would be better to summarise what the fixes are in the title if possible as this is the one we will see when it’s squash merged. fix is already the first word so that’s redundant.

[lukecologne]

It's a bit hard, since they're basically all independent fixes