Add Python icon support for Micromamba environments

[b4rlw]

Suggesting a new section? Consider the following validations.

• [X] It will not clutter the prompt
• [X] It will not slow down the prompt
• [X] It is worth to be aware of

The problem

Micromamba is a great new tool which is becoming increasing popular for bootstrapping conda environments, especially in remote containers.

As far as I can tell, Spaceship does not use graphical icons to beautify the prompt while in a micromamba environment.

Describe the solution you'd like

Add the same icon support for micromamba environments as is currently supported for conda and venv environments.

Describe alternatives you've considered

No response

Documentation and adoption

No response