fix(hyfi): add plugin initialization details

src/hyfi/__init__.py

@@ -38,5 +38,15 @@ def initialize_global_hyfi(
     Initializes the global HyFI instance.
 
     This function should be called before any other HyFI function.
+
+    A plugin is a python module which contains a configuration module.
+
+    Be careful!
+    It does not check if the plugin is importable.
+
+    Args:
+        package_name: Name of the package. e.g. `hyfi`
+        version: Version of the package. e.g. `0.1.0`
+        plugins: A list of plugins to load. e.g. `["hyfi.conf"]`
     """
     global_hyfi.initialize(package_name=package_name, version=version)