Improve release process to minimze the risk of issues

[ddrcode]

The recent bug with macros crate version (#72 ) in 0.2.3 proved there is much stronger control needed in the release process.

Tasks

• Add cargo-public-api tool (would help to ensure Ensure the API follows "Rust API Guidelines" #70)
• Add cargo-semver-checks tool
• Define publish task in the justfile
• Lockstep macros version in main lib Cargo.toml (i.e. maiko-macros = "=0.2.4")
• for inner crates use publish = false
• automate version bumping with either release-plz or cargo-smart-release - they handle workspace release and dependency handling (unlike cargo set-version)