feat: add native font theme

data/fonts/native.toml

@@ -0,0 +1,14 @@
+# The Native Font Theme provides optimum text rendering on every device and OS.
+# Note that the native font families are automatically populated by Academic.
+
+# Font style metadata
+name = "Native"
+
+# Optional Google font URL
+google_fonts = ""
+
+# Font families
+heading_font = ""
+body_font = ""
+nav_font = ""
+mono_font = ""