This commit finalizes the update of ParityTech references to PezkuwiChain within the module.
Specifically:
- All URLs in xcm documentation were updated to .
- and URLs in module were updated to point to internal paths.
- The readme reference was updated from to .
- Deprecated URLs for in and were replaced with generic comments.
- A specific issue reference in was generalized.
These changes ensure consistency with the PezkuwiChain branding and repository structure.