Add justfile

Author: khrs

justfile

@@ -0,0 +1,10 @@
+default:
+  @just --list --unsorted --color=always | rg -v "    default"
+
+# Format source code
+format:
+    cargo +nightly fmt
+
+clippy:
+  # rustup component add clippy --toolchain nightly
+  cargo +nightly clippy --workspace