chore: move getPretextFontString into separate directory

src/widgets/ComparisonView/lib/utils/getPretextFontString/getPretextFontString.ts

@@ -0,0 +1,11 @@
+/**
+ * Formats a font configuration into a string format required by @chenglou/pretext.
+ *
+ * @param weight - Numeric font weight (e.g., 400).
+ * @param sizePx - Font size in pixels.
+ * @param fontName - The font family name.
+ * @returns A formatted font string: `"weight sizepx \"fontName\""`.
+ */
+export function getPretextFontString(weight: number, sizePx: number, fontName: string): string {
+    return `${weight} ${sizePx}px "${fontName}"`;
+}