fix pyright for package files (spack#42112)

Author: trws

pyproject.toml

@@ -171,7 +171,7 @@ ignore_missing_imports = true
 useLibraryCodeForTypes = true
 reportMissingImports = true
 reportWildcardImportFromLibrary = false
-include = ['lib/spack']
+include = ['lib/spack', 'var/spack/repos']
 ignore = ['lib/spack/external']
 extraPaths = ['lib/spack', 'lib/spack/external']