Need to update the syntax highlighting colors to make it work with commonly available terminals

[StevenBucher98]

Prerequisites

• Write a descriptive title.
• Make sure you are able to repro it on the latest version
• Search the existing issues.

Steps to reproduce

This is with #31 build, the code colors are difficult to see when its not PowerShell.

Expected behavior

See the code easily

Actual behavior

can't, see image

Error details

n/a

Environment data

7.4

Version

PR 31

Visuals

[daxian-dbw]

This is because the default terminal on macOS doesn't support 24bit color. The syntax highlighting uses RGB color VT format, and they are not supported in the default terminal on macOS. @StevenBucher98 has confirmed that it works fine in iTerm2.