Render right or left bracket border thicker depending on the cursor position relative to initial bracket

<!-- ⚠️⚠️ Do Not Delete This! feature_request_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- Please search existing issues to avoid creating duplicates. --> <!-- Describe the feature you'd like. --> # Discussion Sometimes when you are writing code you need to find the other end of parenthesis to be sure you have just the right amount. The other end of the parentheses is shown, this is helpful. But this can be ambiguous for the outermost matched pair because your cursor is inside or outside that last pair and the corresponding highlight only matches the character as a whole. This can be shown visibly. # Current  # Proposed