fix(transpile): read workflow file in UTF-8 encoding (#42)

src/comfy_script/transpile/__main__.py

@@ -1,12 +1,13 @@
+from typing import TextIO
 import click
 
 from . import *
 
 @click.command(help='Transpile workflow to ComfyScript.')
-@click.argument('workflow', type=click.File('r'))
+@click.argument('workflow', type=click.File('r', encoding='utf-8'))
 @click.option('--api', type=click.STRING, default='http://127.0.0.1:8188/', show_default=True)
 @click.option('--runtime', is_flag=True, default=False, show_default=True, help='Wrap the script with runtime imports and workflow context.')
-def cli(workflow, api: str, runtime: bool):
+def cli(workflow: TextIO, api: str, runtime: bool):
     workflow = workflow.read()
     script = WorkflowToScriptTranspiler(workflow, api).to_script(runtime=runtime)
     print(script)