chore: improve licensing

pixi.toml

@@ -33,6 +33,15 @@ install = "cargo install --path . --locked"
 check = { depends-on = ["format", "lint", "tests", "check-docs", "doc-build"] }
 build-lean = "cargo build --release --no-default-features"
 
+setup-tools = "cargo install cargo-about --locked --features cli"
+licenses = "cargo about generate about.hbs -o THIRD-PARTY-LICENSES.txt"
+
+[tasks.dist]
+description = "Assemble a release bundle (binary + license notices) in dist/"
+depends-on = ["build", "licenses"]
+cmd = "mkdir -p dist && cp target/release/coursebank dist/ && cp LICENSE.md THIRD-PARTY-LICENSES.txt dist/"
+
+
 [tasks.cb]
 cmd = "cargo run --release --quiet --"
 description = "Run the CLI, e.g., `pixi run cb validate --course examples/course`"