Support region without brackets

[thammin]

Hi, what an lovely extension!
It will be very handy if we can use it without the brackets.

Example Code:

#region SomeOldCodes

Example Settings:

"coloredRegions.namedColors": {
    "SomeOldCodes": "rgba(79, 44, 115, 0.5)"
}

[lonix1]

This would play better with existing tools and vscode plugins, so +1

[Kasheftin]

In my opinion, using brackets for color customization is a nice and stable approach. In our project, we defined short color names like imports, main, hooks, etc. and we would not like if a region defined by #region kanban csv imports methods was colored in [imports] color because it has imports word in the comment.