Enable panic handling in release mode?

[valadaptive]

Right now, there's code to catch panics and display them as error dialogs, but it only runs in debug mode. Is there a significant performance or binary size cost to enabling this in release mode as well? There are many benefits of doing so:

• Many debug builds run quite slowly. Being able to debug panics with fast release builds would be helpful.
• If you don't use debug builds at all because they're so slow, you may not even be aware that the panic handler exists and is a very helpful debugging tool. I only learned about it when you mentioned it in Parameters' UI flags cannot be modified in-place #6.
• If an effect panics and it is caught, users can save their work instead of having After Effects instantly crash and lose it all.
• Displaying the panic message in the dialog box allows users to file more descriptive bug reports that point to the offending code.

[AdrianEddy]

I haven't benchmarked it, but I just did that to make sure to not any additional overhead, since generally the plugins are performance critical. I think we can make that the default feature flag, available to turn off by the plugin author if necessary

[AdrianEddy]

Looks like catch_unwind is not great for performance so I don't think adding it by default is a good idea in this case. Instead, I documented it in the README advising to add change optimization level of the debug builds.

I added the panic handler as an optional feature ("catch-panics")