refactor(fonts): move font size to Params + rename Default to Minimal

Rename Default font set to Minimal.
Move `font_size` option from font sets to `params.toml`.

data/fonts/classic.toml

@@ -9,7 +9,3 @@ heading_font = "Lato"
 body_font = "Merriweather"
 nav_font = "Lato"
 mono_font = "Roboto Mono"
-
-# Font size
-font_size = "20"
-font_size_small = "16"

data/fonts/minimal.toml

@@ -1,5 +1,5 @@
 # Font style metadata
-name = "Default"
+name = "Minimal"
 
 # Optional Google font URL
 google_fonts = "Montserrat:400,700|Roboto:400,400italic,700|Roboto+Mono"
@@ -9,7 +9,3 @@ heading_font = "Montserrat"
 body_font = "Roboto"
 nav_font = "Roboto"
 mono_font = "Roboto Mono"
-
-# Font size
-font_size = "20"
-font_size_small = "16"

data/fonts/mr_robot.toml

@@ -9,7 +9,3 @@ heading_font = "Orbitron"
 body_font = "B612 Mono"
 nav_font = "B612 Mono"
 mono_font = "B612 Mono"
-
-# Font size
-font_size = "20"
-font_size_small = "16"

data/fonts/rose.toml

@@ -9,7 +9,3 @@ heading_font = "Lora"
 body_font = "Roboto"
 nav_font = "Lora"
 mono_font = "Cutive Mono"
-
-# Font size
-font_size = "20"
-font_size_small = "16"