Run button does nothing when Python is not installed

[cwebster-99]

Observed user install the Python extension and create a python file (they had not installed a Python interpreter), they tried to run via the run button but got no feedback / nothing happened. We should show some error rather than failing silently.

Note: This was via the Python extension not Python Envs

[eleanorjboyd]

@karthiknadig are you looking to support install python if its not found in MVP or should I work on the error here? Would this live in the envs ext or in the python extension ? Should be the envs ext because the python ext calls it but wanted to confirm

[cwebster-99]

I don't believe installing Python will be included in the MVP so I would recommend providing some sort of error.