chore: add LICENSE file and format README.md

- add MIT LICENSE file for the project
- reformat README.md code block indentation for better readability

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 endo Team
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -5,8 +5,8 @@
 [![CI](https://github.com/gookeryoung/pyflowx/actions/workflows/ci.yml/badge.svg)](https://github.com/gookeryoung/pyflowx/actions/workflows/ci.yml)
 [![PyPI](https://img.shields.io/pypi/v/pyflowx.svg)](https://pypi.org/project/pyflowx/)
 [![Python](https://img.shields.io/pypi/pyversions/pyflowx.svg)](https://pypi.org/project/pyflowx/)
-[![Coverage](https://img.shields.io/badge/coverage-100%25-brightgreen.svg)](https://github.com/pyflowx/pyflowx)
-[![License](https://img.shields.io/pypi/l/pyflowx.svg)](https://github.com/pyflowx/pyflowx/blob/main/LICENSE)
+[![Coverage](https://img.shields.io/badge/coverage-100%25-brightgreen.svg)](https://github.com/gookeryoung/pyflowx)
+[![License](https://img.shields.io/pypi/l/pyflowx.svg)](https://github.com/gookeryoung/pyflowx/blob/main/LICENSE)
 
 PyFlowX 把"任务依赖"这件事做到极致简单：**参数名就是依赖声明**。无需装饰器、
 无需样板包装器，写一个普通函数，框架按参数名自动注入上游结果。
@@ -44,13 +44,16 @@ uv add pyflowx
 ```python
 import pyflowx as px
 
+
 def extract() -> list[int]:
     return [1, 2, 3]
 
+
 # 参数名 extract 自动匹配上游任务名 → 自动注入
 def double(extract: list[int]) -> list[int]:
     return [x * 2 for x in extract]
 
+
 graph = px.Graph.from_specs([
     px.TaskSpec("extract", extract),
     px.TaskSpec("double", double, ("extract",)),
@@ -145,14 +148,17 @@ report.describe()              # 人类可读报告
 ```python
 from typing import Any, Dict
 
+
 def aggregate(ctx: px.Context) -> Dict[str, Any]:
     """ctx 包含所有 depends_on 任务的返回值。"""
     return dict(ctx)
 
+
 def merge(fetch_a: str, fetch_b: str) -> str:
     """fetch_a / fetch_b 自动注入。"""
     return fetch_a + fetch_b
 
+
 def fetch_user(uid: int) -> dict:  # uid 来自 TaskSpec.args
     ...
 ```