v0.5: Tiny Zig builds

The Zig toolchain has reduced the size of the binaries by quite a bit.

What's Changed

• Add Zig CI builds by @fwsGonzo in #3

New Contributors

• @fwsGonzo made their first contribution in #3

Full Changelog: v0.4...v0.5

v0.4: Added public APIs to all programs

Full Changelog: v0.3...v0.4

v0.3: Improved LuaJit API

Full Changelog: v0.2...v0.3

v0.2: Each program separated

Each program is now separated into its own zip file

Full Changelog: v0.1...v0.2

v0.1: Initial Examples

Full Changelog: https://github.com/libriscv/godot-sandbox-programs/commits/v0.1