migrate to Dagger 1.0

Author: dagger-codex[bot]

.dagger/config.toml

@@ -0,0 +1,6 @@
+# Dagger workspace configuration
+# Install modules with: dagger install <module>
+# Example:
+#   dagger install github.com/dagger/dagger/modules/wolfi
+
+[modules]

.dagger/migration-report.md

@@ -0,0 +1,10 @@
+# Migration Report
+
+## Root module requires explicit loading
+
+The root `dagger.json` is still a valid module, but it must be loaded explicitly.
+
+- **This works**: `dagger -m . call --help`
+- **This no longer works**: `dagger call --help`
+
+ACTION: If your scripts rely on implicit loading of the root module, change them to use explicit loading.