Add TCRdock for TCR:pMHC prediction

[eliasball]

Description of feature

Hey there!
As part of my bachelors thesis, I am working on integrating TCR:pMHC structure prediction using the TCRdock tool into the nf-core/proteinfold pipeline.
This is a specialized AlphaFold-based tool for the structure prediction of TCR:pMHC complexes.
I am nearly done with the integration and it would be awesome to add the functionality to the official proteinfold pipeline for others to use. I will create a PR shortly.

Best,
Elias