Infer environment variables for an activated conda environment

[paulacamargo25]

• Investigate right way to get activated environment variables from conda.
• Create a new terminal that already contains the environment variables in a conda environment

Follow #192

[brettcannon]

FYI conda/conda#9796 might have some interesting information (especially conda/conda#9796 (comment)).

[paulacamargo25]

The command conda shell.posix+json activate env works and return the information that we need.