misc: Add Justfile

This just lists the commands in the Contributing manual

Justfile

@@ -0,0 +1,16 @@
+# Common commands
+#
+# Contributing manual:
+# - https://nix-community.github.io/home-manager/#ch-contributing
+
+# List tests matching a pattern `pattern`
+list *pattern:
+  nix run .#tests -- -l {{pattern}}
+
+# Run all tests matching a pattern `pattern`
+test *pattern:
+  nix run .#tests -- {{pattern}}
+
+# Run integration tests
+integration_tests:
+  nix run .#tests -- -t -l