SwiftGogot 0.46

This version of SwiftGodot includes the following changes:

Features

• Support for Godot 4.3 APIs, apologies for the delay.

Performance

• Allocation-less marshaling for built-in and class types methods.
  The runtime no longer needs to allocate temporary variables to call
  into Godot, we now pass data directly from the stack (Elijah
  Semyonov)

• More progress to perform Vector3 operations in Swift-land, without
  having to call into Godot to do the (Elijah Semyonov)

• Arguments are now borrowed, without being copied (Elijah Semyonov)

Quality of Life Improvements

• Warn users if they declare types that conflict with Godot types (Rob
  Mayoff)

• Large class of memory leaks with variants have been fixed in a
  multi-week effort by Elijah Semyonov that tracked every single
  dangling reference to their root cause. This is truly a gift of the
  gods for all SwiftGodot users.

  #545, #541, #542, #548, #550, #552, #551

  And also a great test suite to ensure we do not regress.

• New marshalling infrastructure that works on Windows, and removes
  the previous optimization that was failing to compile on Windows.

Fundamentals

• Fix deprecated code usage (Luke Puchner-Hardman, Elijah Semyonov)

• Fix a scenario where we did not lookup the most-derived type (Justin
  Anderson)

• Fix crashes on some indexer operation (Elijah Semyonov)

Maintenance

• Avoid name clashes with swift language keywords (Jakob
  Winkler)

• Remove hard-coded values on my development system so everyone can
  enjoy it (Elijah Semyonov)