fix(serverlibrary): fix package structure

structure needs to be:
serverlibrary/
├── pyproject.toml
└── serverlibrary/
    ├── __init__.py
    └── core.py

serverlibrary/pyproject.toml

@@ -9,3 +9,5 @@ description = "Serverhost Python library"
 authors = [{ name = "Lucas" }]
 readme = "README.md"
 requires-python = ">=3.10"
+[tool.setuptools]
+py-modules = ["serverlibrary"]