feat(python-generator)!: do not require specific structure

Removed all implicit assumptions of a project structure:
  - no 'src/' directory is required
  - top-level modules are no longer ignored

src/jcloud_docsgen/core/python/_core.py

@@ -1104,19 +1104,15 @@ class PythonDocumentationGenerator:
 
         return namespace
 
-    def namespace(self) -> list[PythonPackageNamespace]:
+    def namespace(self) -> PythonPackageNamespace:
         """
         Returns the project as a namespace.
 
         :return: The project as a namespace.
-        :rtype: list[PythonPackageNamespace]
+        :rtype: PythonPackageNamespace:
         """
 
-        src_dir = self.project_directory / 'src'
-
-        return [
-            self._namespace(dir) for dir in src_dir.iterdir() if dir.is_dir()
-        ]
+        return self._namespace(self.project_directory)
 
     def generate_documentation(self) -> None:
         """
@@ -1127,10 +1123,10 @@ class PythonDocumentationGenerator:
         self.docs_directory.mkdir(parents=True, exist_ok=True)
 
         _generate_package_namespace_documentation(
-            PythonPackageNamespace('src', self.namespace()),
+            self.namespace(),
             self.docs_directory,
-            self.project_directory / 'src',
-            self.project_directory / 'src',
+            self.project_directory,
+            self.project_directory,
             self.include_sections,
             self.kwargs,
         )