Ensure extensions are checked longest-first

Misc. micro optimizations for compiler

Micro-optimizations around instance initialization/cleanup

Misc. spacing

Updated SQLite dlls used for tests to 3.38.0

Ignore indexed properties when stringifying + update test

Added IntToStr base variant + fixed overload issues + added & updated…

… tests that were relying on IntToStr not being overloaded

Refactored dynamic arrays + initial JIT x86-64 support

Array indices upgraded from Integer to NativeInt