Treat numbers as separate word / parts, including decimal points

<!-- ⚠️⚠️ 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. --> Example use case is css, but really, this is widely applicable. Examples of wanted behaviors, using pipe (`|`) as the cursor (caret) position: Feature 1: Move by word or word part - Move right from `|123rem` becomes `123|rem` - Move left from `123rem|` becomes `123|rem` Feature 2: Treat decimal points (single dot or comma character) as same word when surrounded by digits - Move right by word (once) from `|1.23rem` becomes `1.23|rem` - Move right by word part (thrice) from `|1.23rem` becomes `1|.23rem` `1.|23rem` `1.23|rem` Obviously, extend this behavior to all respective functions: move, select, delete forward / backward. Respective settings options: Treat numbers as separate words (dropdown select) 1. Treat numbers as separate words and word parts (default) 2. Treat numbers as separate word parts 3. Off (current behavior) Treat decimal points (single dot or comma character) as same word (checkbox), default on.