Add template_docstring decorator which allow to template Python docstring.

aidge_core/__init__.py

@@ -9,3 +9,4 @@ SPDX-License-Identifier: EPL-2.0
 """
 from aidge_core.aidge_core import * # import so generated by PyBind
 from aidge_core.export import ExportNode
+import aidge_core.utils

aidge_core/utils.py

+def template_docstring(template_keyword, text_to_replace):
+    """Method to template docstring
+
+    :param template: Template keyword to replace, in the documentation you template word must be between `{` `}`
+    :type template: str
+    :param text_to_replace: Text to replace your template with.
+    :type text_to_replace: str
+    """
+    def dec(func):
+        if "{"+template_keyword+"}" not in func.__doc__:
+            raise RuntimeError(
+                f"The function {function.__name__} docstring does not contain the template keyword: {template_keyword}.")
+        func.__doc__ = func.__doc__.replace(
+            "{"+template_keyword+"}", text_to_replace)
+        return func
+    return dec