feat(processes): use process package

[Phil91]

Description

• remove existing process worker library code
• use the existing process worker package

Why

To get rid of duplicate code and use the existing package which is provided by the portal-backend

Issue

Refs: #3

Checklist

• I have performed a self-review of my own code
• I have successfully tested my changes locally
• I have added tests that prove my changes work
• I have checked that new and existing tests pass locally with my changes
• I have commented my code, particularly in hard-to-understand areas
• I have added copyright and license headers, footers (for .md files) or files (for images)