fix(editor): show wavy and dotted underlines on macOS (#1086)

Error, warning, weak-warning and typo underlines never showed on macOS, nor did underline effects of syntax tokens from a colour scheme: WebKit rejects a text-decoration shorthand with a style or colour (underline wavy <colour>), so the declaration fell back to none.

The editor's diagnostic and token styles also set -webkit-text-decoration, which WebKit takes the full value through; the red wavy underlines of the Problems, Build, Project and Database views use the longhand properties.

src/features/build/Build.module.css

@@ -42,7 +42,9 @@
   color: var(--fg-muted);
 }
 .fileError {
-  text-decoration: underline wavy var(--danger);
+  text-decoration-line: underline;
+  text-decoration-style: wavy;
+  text-decoration-color: var(--danger);
   text-decoration-skip-ink: none;
   text-underline-offset: 3px;
 }