Add math fonts.

packages/Fonts.sty

@@ -5,7 +5,7 @@
 
 % Loading math fonts takes a long time, so skip it in draft mode.
 \bool_if:NF \g_draft_bool {
-	\usepackage{notomath}
+	\RequirePackage{notomath}
 }
 
 \NewDocumentCommand{\fontpath}{}{PrimeTeX/fonts}
@@ -61,6 +61,15 @@
 	ItalicFont		= NotoEmoji/NotoEmoji-Light,
 ]
 
+\newfontfamily{\mtfamily}{NotoSerif}[
+	Path			= {\fontpath/NotoSerif/},
+	Extension		= .ttf,
+	UprightFont		= *-Regular,
+	BoldFont		= *-Bold,
+	ItalicFont		= *-Italic,
+	BoldItalicFont	= *-BoldItalic,
+]
+
 % Box drawing font: Noto Sans Symbols 2
 \newfontfamily{\bxfamily}{\fontpath/NotoSansSymbols2-regular.ttf}
 
@@ -72,6 +81,7 @@
 \NewDocumentCommand{\slab}{m}{{\sbfamily{}#1}}
 \NewDocumentCommand{\code}{m}{\mono{\small{}#1}}
 \NewDocumentCommand{\emoji}{m}{{\emfamily{}#1}}
+\NewDocumentCommand{\maths}{m}{{\mtfamily{#1}}}
 
 % Line-breaking zero-width space.
 \NewDocumentCommand{\zws}{}{\hspace{0pt}}