generated file notifies users not to edit file

Signed-off-by: Aminu 'Seun Joshua <seun.aminujoshua@gmail.com>

Author: seun-ja

src/summary.rs

@@ -1163,6 +1163,11 @@ impl<'a> Summary<'a> {
             alias_module: Option<String>,
         }
 
+        let file_header = "
+# This file is automatically generated by componentize-py
+# It is not intended for manual editing.
+";
+
         let mut interface_imports = HashMap::<InterfaceId, Definitions>::new();
         let mut interface_exports = HashMap::<InterfaceId, Definitions>::new();
         let mut world_imports = Definitions::default();
@@ -1799,7 +1804,7 @@ Result = peer.types.Result
 
                 write!(
                     file,
-                    "{python_imports}
+                    "{file_header}{python_imports}
 
 S = TypeVar('S')
 @dataclass
@@ -1853,7 +1858,7 @@ Result = Union[Ok[T], Err[E]]
 
                 write!(
                     file,
-                    "{docs}{python_imports}
+                    "{file_header}{docs}{python_imports}
 from ..types import Result, Ok, Err, Some
 {imports}
 {types}
@@ -1884,7 +1889,7 @@ from ..types import Result, Ok, Err, Some
 
                 write!(
                     file,
-                    "{docs}{python_imports}
+                    "{file_header}{docs}{python_imports}
 from ..types import Result, Ok, Err, Some
 {imports}
 {types}
@@ -1931,7 +1936,7 @@ class {camel}(Protocol):
 
             write!(
                 init,
-                "{python_imports}
+                "{file_header}{python_imports}
 from ..types import Result, Ok, Err, Some
 {imports}
 {protocols}
@@ -1983,7 +1988,7 @@ from ..types import Result, Ok, Err, Some
 
             write!(
                 file,
-                "{docs}{python_imports}
+                "{file_header}{docs}{python_imports}
 from .types import Result, Ok, Err, Some
 {imports}
 {type_exports}