Add GitHub Actions for CI/CD

[SoftwareRat]

This pull request introduces a new GitHub Actions workflow for building and releasing the PS3Dec project. The workflow automates building the project on multiple platforms, packaging the build artifacts, and creating a GitHub release when a new version tag is pushed.

Continuous Integration and Release Automation:

• Added .github/workflows/build.yml to define a multi-platform build and release workflow. The workflow triggers on pushes to main, tags starting with v, pull requests to main, and manual dispatch.
• Configured build jobs for Linux, Windows, and macOS using Rust, with platform-specific packaging and artifact upload steps.
• Added a release job to automatically create a GitHub release and upload packaged artifacts when a version tag is pushed.