Add hello world example to readme

README.md

@@ -10,14 +10,32 @@ pip install magicli
 
 ## Get started
 
-Basic usage example.
+Hello world example.
-By default, every function except for the `main` function is callable through command line arguments.
+
+Docstrings can be added to variables by using `typing.Annotated`.
+A short option can be added as a third argument to `Annotated`.
+
+By default the first function is called automatically. All following functions in the file are treated as commands. Functions starting with an underscore are ignored.
 
 ```python
-from magicli import magicli
+from typing import Annotated
 
-def main():
+def hello(
-    magicli()
+    name: Annotated[str, 'Person to call'],
+    amount: Annotated[int, 'Person to call', 'a']=1,
+):
+    for _ in range(amount):
+        print(f"Hello {name}!")
+
+if __name__ == '__main__':
+    import magicli
+```
+
+```bash
+$ hello world 3
+Hello world!
+Hello world!
+Hello world!
 ```
 
 ### Define name of CLI in `setup.py`