New sim run parameters

[HTJense]

In preparation for the simulation runs and unblinding, the following changes are prepared:

• New simulation presets are added as separate files, and old files are updated if needed.
• The calibration and polarization efficiency parameters are now set to vary instead of remaining fixed.
• The bandpass uncertainty values are now marginalized over.
• The restriction on the CIB spectral indices is loosened.
• (Not yet implemented in upstream MFLike and checked here) Added a varying spectral index for the radio sources.
• The ell ranges are updated, as are all cross-spectra from those.

In addition, I have done some organisational changes and split everything into separate folders for tidiness, and updated the readme.

[xgarrido]

I see that there are 2 cosmology settings and especially one sampling H0. But in the default case i.e. cosmology.yaml, H0 is not derived (camb/cosmopower settings add a bunch of derived parameters but not this one since, of course, it can be sampled in cosmology_H0.yaml file). I think we should add H0 as derived parameter within cosmology.yaml file to get it.