Documentation Improvement: Clarification on Emulator Usage

[grasmarcussanti129]

Issue Summary

The usage section of the README could benefit from clearer instructions regarding how to start the ITS system for each emulator. Specifically, it would help if there were sectioned instructions or bullet points that specify what commands to enter depending on the emulator being used.

Proposed Changes

1. Add emulator headers: Under the 'Usage' section, introduce headers for each emulator type such as ### For klh10 Emulator, ### For pdp10-ka Emulator, etc.
2. Specific Instructions: After each header, provide specific, step-by-step instructions for starting ITS in that emulator, making the process clearer.

This enhancement would improve user experience by making it easier for new users to set up and start ITS correctly, reducing the potential for confusion.