Add an example for using decman

example/plugin/decman_plugin_example.py

@@ -8,3 +8,13 @@ class Example(decman.Plugin):
 
     def available(self) -> bool:
         return os.path.exists("/tmp/example_plugin_available")
+
+    def process_modules(self, store: decman.Store, modules: set[decman.Module]):
+        # Toy example for setting modules as changed
+        for module in modules:
+            module._changed = True
+
+    def apply(
+        self, store: decman.Store, dry_run: bool = False, params: list[str] | None = None
+    ) -> bool:
+        return True