Draft: enable DFT+U with SOC for s, p, and f orbitals

Draft: enable DFT+U with SOC for s, p, and f orbitals

@jjunquer Could you check?

Details

Please detail what this MR introduces

• Describe in details what this MR does? (link to the issue by writing # here)
• Does this MR change the behaviour of any fdf-flags? If so, ensure this is documented in the manual
• If new fdf-flags are added, please add thorough descriptions to the manual
• add a summary sentence in the ReleaseNotes.md file
• if this breaks compatibility, add mentions to the Docs/compatibility.tex

Why is it needed

The DFT+U with SOC is only available for d orbitals, because the Slater-F(n) coefficients are not tabled.

Authors