chore: add classifiers to pyproject.toml

pyproject.toml

@@ -6,6 +6,20 @@ authors = ["jason810496 <810496@email.wlsh.tyc.edu.tw>"]
 license = "MIT"
 readme = "README.md"
 keywords = ["pgmq","PGMQ","sqlalchemy","SQLAlchemy","tembo_pgmq_python"]
+classifiers = [
+    "Intended Audience :: Information Technology",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Operating System :: Microsoft :: Windows",
+    "Operating System :: POSIX",
+    "Operating System :: Unix",
+    "Operating System :: MacOS",
+]
 
 [tool.poetry.urls]
 "Homepage" = "https://github.com/jason810496/pgmq-sqlalchemy"