Luau.Unity 0.3.0

What's Changed

• Add generated first-party bytecode manifest workflow by @quentinleon in #6
• chore(deps): bump actions/checkout from 7.0.0 to 7.0.1 by @dependabot[bot] in #7
• Add full Luau scripting demo sample by @quentinleon in #8
• build: add cross-platform Linux testability tooling by @quentinleon in #9

Full Changelog: v0.2.0...v0.3.0