py-topdir.mk: Use ruff and yapf
- Use pyright for the target py-check-syntax
- Generate a $(TOPDIR)/pyrightconfig.json for that
- Add pyrightconfig-base.json because it's used by
pyrightconfig.json
- Add python3-pyright to pkg.requires.release, anticipating the use
of the py-syntax-check target by CI
Signed-off-by: Jan Lindemann <jan@janware.com>