v0.25: API and stability improvements

A small release that adds stability and continues to improve the C++ API surface

• Adds complete support for the Plane variant type
• Adds opaque RID support, pass-through
• Adds constructors to all Vector classes
• Add print/stdout redirect to Callable
• Add new PROPERTY(name) macro for objects to simplify adding properties
• Add proper index operator Array that can get/set
• Improve performance of getting/setting properties on objects
• Improve performance of get_node() and derivatives
• Prevent reloading/resetting a Sandbox while it's in a function call
• Expose ELFScript::get_content() so that the program bytes can be directly loaded into a Sandbox
• Several other bug fixes

PRs

• Possible fix for web double builds by @Ughuuu in #183
• Implement Plane variant, add constructors to Vectors by @fwsGonzo in #185
• Add PropertyProxy and ArrayProxy classes by @fwsGonzo in #186
• Fixed icons missing after theme change by @CycloneRing in #187

New Contributors

• @CycloneRing made their first contribution in #187

Full Changelog: v0.24...v0.25