Typography: added fonts/styles for headings and various text sizes

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties

@@ -26,6 +26,38 @@
 #       Instead copy and modify only those properties that you need to alter.
 #
 
+#---- typography / fonts ----
+
+# headings
+h00.font = +24
+h0.font = +18
+h1.font = +12
+h2.font = +6
+h3.font = +3
+h4.font = bold
+
+# text
+large.font = +2
+medium.font = -1
+small.font = -2
+mini.font = -3
+
+# default font
+#defaultFont = ...
+
+# styles
+[style].h00 = font: $h00.font
+[style].h0 = font: $h0.font
+[style].h1 = font: $h1.font
+[style].h2 = font: $h2.font
+[style].h3 = font: $h3.font
+[style].h4 = font: $h4.font
+[style].large = font: $large.font
+[style].medium = font: $medium.font
+[style].small = font: $small.font
+[style].mini = font: $mini.font
+
+
 #---- UI delegates ----
 
 ButtonUI = com.formdev.flatlaf.ui.FlatButtonUI