Bugfix: Fix p_sample input args and resample loop of Repaint method

[AlejandroSantorum]

Closes #319 👍

Contributions:

• Fixing input parameters of the p_sample method when called from the resample loop in the p_sample_loop method.
• Fixing resample loop, which should be inside the usual sample loop, as described in line 9 of Algorithm 1 of the original paper https://arxiv.org/pdf/2201.09865.
• Adding resample_every input argument to speed up sampling and resampling.
• Improving code style by specifying input argument names in p_sample, p_sample_loop and sample.

Many thanks.