v0.9: Sandboxed properties, basic monitoring

Sandboxes can now expose properties that are tied to VM data.

There is also monitoring for the Sandbox, in order to be able to easily see memory leakage, vmcall spam or execution timeouts.

As always, remember to docker pull the C++ and Rust containers.

WARNING: In this release you may have to check for editor:

	if (is_editor())
		return {};

Enabling the sandoxes to act as tools also allows them to have options in the GUI.

PRs

• Sandboxed properties by @fwsGonzo in #60

Full Changelog: https://github.com/libriscv/godot-sandbox/compare/v0.8...