Add helper button to print a wide range of ansi colors

[Tyriar]

Similar to the box drawing and powerlines buttons in the test tab of the demo, a helper for printing out different color modes would be of great help. Something like this to give an idea, but that prints every color (a separate button for each color mode?)

echo -e '\x1b[0mDefault'
echo -e '\x1b[7mDefault (inverse)\x1b[0m'
echo -e '\x1b[33mPalette 16 (color #3, yellow)\x1b[0m'
echo -e '\x1b[38;5;50mPalette 256 (color #50)\x1b[0m'
echo -e '\x1b[38;2;255;0;0mRGB/True color (color #FF0000)\x1b[0m'

[deepanshu44]

Hello @Tyriar , In this particular issue, is it required to print something like this?

[Tyriar]

@deepanshu44 basically yeah, but also including true color and both foreground and background styles.

[deepanshu44]

Forgive my ignorance, but I am unaware of what true colors are.
And also, what do you mean by both foreground and background styles and color mode?

Edit: I think this issue requires some extra knowledge, therefore, I should drop this and look into other issues.

[Tyriar]

@deepanshu44 np. FYI these are just the different types of colors, the 38;2 above is true color, foreground uses 3x, background uses 4x

[deepanshu44]

@Tyriar Thanks for providing FYI, I understood what's supposed to be done.

If I am correct than, the end results should look something like this displaying 256 colors.

[Tyriar]

@deepanshu44 yep 👍

[deepanshu44]

Hello @Tyriar , I need to ask whether in order to display colours, are we required to use a script or write term.write() multiple times or there is a different approach?

Both ways are fine for me.

[Tyriar]

The term.write approach is best as a script wouldn't work across all shells/operating systems. For the order, something like how underline colors are show (0-255, then some color ramps?):