Improve the justfile

Adds descriptions and a 'list' function that runs as the default

Change-Id: Ifee2c8ccd2694af0ca8bd94744f8be99f91b254a

justfile

@@ -1,19 +1,27 @@
 # https://just.systems/man/en/
 
+# List all available targets
+list:
+    just --list
+
+# Clean build artifacts
 clean:
     rm -rf build
 
+# Prepare meson for building
 setup:
     meson setup build --prefix="$PWD/outputs/out"
 
+# Build lix
 build *OPTIONS:
     meson compile -C build {{ OPTIONS }}
 
-compile:
-    just build
+alias compile := build
 
+# Install lix for local development
 install *OPTIONS: (build OPTIONS)
     meson install -C build
 
+# Run tests
 test *OPTIONS:
     meson test -C build --print-errorlogs --quiet {{ OPTIONS }}