🛰️ export from upstream (18069bd)

justfile

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+# Justfile for Sandcage
+
+# Default: list available recipes.
+default:
+    @just --list
+
+# Run cargo check.
+check:
+    cargo check
+
+# Run cargo build.
+build:
+    cargo build
+
+# Run unit tests.
+test:
+    cargo test --workspace
+
+# Install sandcage and build images.
+install:
+    cargo install --path crates/sandcage
+    sandcage build --force