chore: use imagefont for hud numbers

sonic-bluestreak.love/assets/gui/fonts/numbers.lua

@@ -0,0 +1,4 @@
+return {
+  glyphs = " 0123456789:/",
+  extraspacing = 1
+}

sonic-bluestreak.love/assets/gui/fonts/smallnumbers.lua

@@ -0,0 +1,4 @@
+return {
+  glyphs = " 0123456789/",
+  extraspacing = 0,
+}