change package directory to src in toml

pyproject.toml

@@ -47,7 +47,7 @@ dev_template = "{tag}"
 dirty_template = "{tag}"
 
 [tool.setuptools.packages.find]
-where = ["."]  # list of folders that contain the packages (["."] by default)
+where = ["src"]  # list of folders that contain the packages (["."] by default)
 include = ["regolith*"]  # package names should match these glob patterns (["*"] by default)
 exclude = []  # exclude packages matching these glob patterns (empty by default)
 namespaces = true  # to disable scanning PEP 420 namespaces (true by default)