replace all 'psuedo' by 'pseudo'

[gitmpr]

Replace all internal occurrences of 'psuedo' and 'Psuedo' by 'pseudo' and 'Pseudo' in filename, module name, and types. No external interfaces depend on this AFAIK, and I was able to build on linux after this modification, so it should be fine.

This is a minor change and mainly me getting more familiar with the contributing process and being perfectionist, wanting consistency after the previous pull request that also changed this in the docs got merged