BracketPairColorizer for light themes

Default the colors for BracketPairColorizer work great for Dark Themes

You can change the colors and I use the following setting for Light+ Theme (White Background color)

```
"bracketPairColorizer.consecutivePairColors": [
"()",
"[]",
"{}",
[
"Orange",
"#990099",
"Blue"
],
"Red"
]
```

The issue does not name a file, test, or entry point. Start by locating the BracketPairColorizer configuration and its default color definitions in the workshop materials, then compare them with the supplied Light+ theme setting. Done means the default colors are readable on light themes without requiring user overrides.

Written by the indexing model from the issue text.