feat(css): text-stroke support (#10399)

closes https://github.com/NativeScript/NativeScript/issues/3597
closes https://github.com/NativeScript/NativeScript/issues/3972

packages/core/ui/styling/css-stroke.ts

@@ -0,0 +1,23 @@
+import { CoreTypes } from '../../core-types';
+import { Color } from '../../color';
+import { parseCSSShorthand } from './css-shadow';
+
+export interface StrokeCSSValues {
+	width: CoreTypes.LengthType;
+	color: Color;
+}
+
+/**
+ * Parse a string into StrokeCSSValues
+ * https://developer.mozilla.org/en-US/docs/Web/CSS/-webkit-text-stroke
+ * @param value
+ */
+export function parseCSSStroke(value: string): StrokeCSSValues {
+	const data = parseCSSShorthand(value);
+	const [width] = data.values;
+
+	return {
+		width,
+		color: new Color(data.color),
+	};
+}