Checklist

• I added a descriptive title
• I searched open requests and couldn't find a duplicate

What is the idea?

Extend conda env list with information about time of environment creation, last update and last activation

Why is this needed?

As a user, i want to understand better, if there are environments in my system, which are not used any more.
conda env list provides list of environments, known to conda, but it doesn't provide any hints, if environment is used.
Providing information about creation time, last update and last activation could be really helpful at this point.

What should happen?

conda list env and conda list env --json should include information about creation, update and last activation
(Feel free to adjust according to other constraints)

Additional Context

No response