info and assign commands handle the custom and docker run tasks

[janosmurai]

Type Of Change

• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Any modification in the test cases
• Any modification in the documentation

Checklist:

• I have read and followed the contribution guideline.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have made corresponding changes to the documentation.

Related Issue

Closing:
DEM-324

Description

The DevEnv descriptor now can contain two task types: docker run and custom.
The assign and init commands updated to manage these new fields.

How Has This Been Tested?

Testen on Ubuntu 22.04.