Add warning about running python code in the extension

[LukeSlev]

Description:

This PR adds a warning to the user that the code they are running is being run on their actual computer

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Testing:

• make sure that running the simulator pops up the notification
• cancel doesn't run the code
• accept and run runs code and you never see the notification again

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[jonathanwangg]

Tested it out and works as described.