Document how to set default colors

[johnpapa]

Setting peacock.color or peacock.remoteColor in the user settings.json can be done manually. If set, peacock will use that color as the default color to colorize VS Code.

This should be documented in the readme, along with considerations.

Considerations:

• this can only be set or unset manually.
• this will make every vs code instance that doesnt have a color in their workspace use the default color
• this could be annoying, use wisely (this is why it is not set via any command)

Why does this exist at all then?

• Good question. The setting is important in the workspace and vs code merges settings across user and workspace settings. So it must exist in all of them, even tho peacock really mostly cares about the workspace. This is why the user setting is not set by default.

[santoshyadavdev]

Taking this up.