add create delete folder files

src/anki_hsk_creator/api.py

@@ -63,6 +63,37 @@ def select_file(file_path: Path) -> ProcessFile:
         raise ValueError(f"{file_path} is not a file")
 
 
+def create_folder(file_path: Path) -> ProcessFile:
+    """Creates a folder in a file_path"""
+    input_folder = INPUT / file_path
+    if input_folder.exists():
+        raise ValueError(f"{file_path} already exists")
+    else:
+        input_folder.mkdir(exist_ok=True, parents=True)
+        return ProcessFile(input_folder)
+
+
+def delete_folder(file_path: Path):
+    """delete an empty folder in file_path"""
+    input_folder = INPUT / file_path
+    if input_folder.exists():
+        if any(Path("some/path/here").iterdir()):
+            raise ValueError(f"{file_path} has files inside")
+        else:
+            input_folder.rmdir()
+    else:
+        raise ValueError(f"{file_path} doesn't exists")
+
+
+def delete_file(file_path: Path):
+    """Deletes a file in a file_path"""
+    input_file = INPUT / file_path
+    if input_file.if_file():
+        input_file.unlink()
+    else:
+        raise ValueError(f"{file_path} doesn't exists")
+
+
 def list_file_resources(file_path: ProcessFile):
     """Returns a list of a file_path resources files"""
     return [file_path.resources.glob("*")]
@@ -130,7 +161,6 @@ def write_input_file(process_file: ProcessFile, text: str):
                 file.write(f"{line}\n")
 
 
-
 def write_resource_file(process_file: ProcessFile, language_id: str, text: str):
     process_file.language_id = language_id
     with process_file.dictionary_resource_file.open(