build: fix host editable install packaging

pyproject.toml

@@ -1,3 +1,7 @@
+[build-system]
+requires = ["setuptools>=68.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
 [project]
 name = "polisher-control-host"
 version = "0.1.0"
@@ -8,6 +12,10 @@ dependencies = []
 [project.optional-dependencies]
 dev = ["pytest>=8", "jsonschema>=4"]
 
+[tool.setuptools.packages.find]
+where = ["host"]
+include = ["polisher_control*"]
+
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 pythonpath = ["host"]