chore: introduce black for code format in github actions (#47)

* use black with SHA1

Author: ChenZiHong-Gavin

.github/workflows/black.yml

@@ -0,0 +1,17 @@
+name: "Black Code Formatter"
+
+on:
+ push:
+ branches:
+ - 'release-*'
+ pull_request:
+
+jobs:
+ lint:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: actions/checkout@v4
+ - uses: psf/black@3702ba224ecffbcec30af640c149f231d90aebdb
+ with:
+ options: "--check --diff --line-length 100"
+ src: "hugegraph-llm/src hugegraph-python-client/src"