chore: Add GitHub workflows for release process and Dependabot config

[pigri]

• Introduced .github/dependabot.yml for daily updates on Cargo and GitHub Actions dependencies.
• Created .github/workflows/release.yaml to automate the release process for the wirefilter-engine crate, including version verification, packaging, publishing, and GitHub release creation.
• Updated .github/workflows/rust.yml to include necessary environment variables for the private Cargo registry.
• Added build.rs for build script support in the engine crate.
• Updated Cargo.toml in the engine crate to include license information and release metadata.
• Expanded README.md with detailed release process instructions and setup requirements.