fix(pyproject): remove extraPaths intended for external libraries

This also resolves issues in editors using the wrong paths for
completion and reporting missing type stubs.

pyproject.toml

@@ -86,7 +86,6 @@ qt_api = "pyside6"
 [tool.pyright]
 ignore = [".venv/**"]
 include = ["src/tagstudio", "tests"]
-extraPaths = ["src/tagstudio", "tests"]
 reportAny = false
 reportIgnoreCommentWithoutRule = false
 reportImplicitStringConcatenation = false