Added batch, bat aliases for shell language

[CyanideByte]

Describe the changes you have made:

• Added aliases 'batch' and 'bat' to the shell language to match the linux/mac aliases.

Reference any relevant issues (e.g. "Fixes #000"):

• Handles the case when local models try to run 'batch' instead of 'shell' on Windows.
• Partially related to: Cannot run scripts that arent python #1231 (comment)

Pre-Submission Checklist (optional but appreciated):

• I have included relevant documentation updates (stored in /docs)
• I have read docs/CONTRIBUTING.md
• I have read docs/ROADMAP.md

OS Tests (optional but appreciated):

• Tested on Windows
• Tested on MacOS
• Tested on Linux

[Notnaton]

Should be under powershell.py ?

Batch and bat is for windows

[CyanideByte]

Should be under powershell.py ?

Batch and bat is for windows

Batch scripts have always been running under shell through jupyter even without the aliases.
This is just to catch a few cases where models specifically mention batch or bat.
I think powershell is differentiated because its running in a separate process.
Jupyter might be able to run powershell as well I'm not sure, but also powershell can't run batch scripts directly.

No problem then

[KillianLucas]

Great work as always @CyanideByte and many thanks @Notnaton for reviewing! Merged.