Add a justfile

Introduce usage of `just` by adding a justfile.

Author: tcharding

justfile

@@ -0,0 +1,32 @@
+[private]
+default:
+  @just --list
+
+
+# run `cargo build` on everything
+build:
+  cargo build --workspace --all-targets
+
+
+# run `cargo check` on everything
+check:
+  cargo check --workspace --all-targets
+
+
+# run code formatter
+format:
+  cargo +nightly fmt
+
+
+# run tests
+test: build
+  cargo test --all-features
+
+
+# run `cargo clippy` on everything
+clippy:
+  cargo clippy --locked --offline --workspace --all-targets -- --deny warnings
+
+# run `cargo clippy --fix` on everything
+clippy-fix:
+  cargo clippy --locked --offline --workspace --all-targets --fix