feat: add Bookerly font plugin with style selection and SmallerFonts integration

plugins/bookerly/BookerlyPlugin.cpp

@@ -0,0 +1,14 @@
+#include "BookerlyPlugin.h"
+
+namespace BookerlyPlugin {
+
+const char* styleName(BookerlyStyle style) {
+    switch (style) {
+        case BookerlyStyle::ITALIC:      return "Italic";
+        case BookerlyStyle::BOLD:        return "Bold";
+        case BookerlyStyle::BOLD_ITALIC: return "Bold Italic";
+        default:                         return "Regular";
+    }
+}
+
+}