fix: use “simctl list” to fetch device types, not file i/o

[hansemannn]

Wow, this was HARD to find..but this is what's happening:

• Xcode 16.3 does not embed the device types (<device>.simdevicetype) under Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/DeviceTypes anymore, in fact, the whole CoreSimulator folder was nuked
• Luckily, xcrun simctl list --json already returns them pre-formatted, so Apple likely decided to sunset the additional files
• We now use that API to fetch the required model identifier and Watch support state
• The following call (to check the devices from simctl) can then be merged into one loop to do all work in one step

Note: I have ditched the legacy code, so ioslib will only be compatible with Xcode 16.3+. As earlier versions use an earlier ioslib version anyway, I don't see a practical issue with that. If it is, feel free to extend this PR to restore that legacy code. The "devicetypes" key in xcrun simctl list --json is actually available since a while now, so we can retain backwards compatibility without issues!

[m1ga]

Only tested the functionality and it works fine 👍
I've deleted 16.2 and only have 16.3 installed now (restarted my machine to be sure). ti info shows all simulators and I can build an app without issues

[cb1kenobi]

Please update this PR to target main instead of 1_7_X.

[hansemannn]

@cb1kenobi Rebased on main completed.