allow new symbols and move settings to yaml file

scripts/md-preamble.tex

 \usepackage{fancyhdr}
 \pagestyle{fancy}
 \fancyhead{}
-\fancyhead[L]{CURRENTCOMMIT}
-\fancyfoot[L]{FILENAME}
+\fancyhead[L]{2022-01-18T21:14:30+01:00 0f8e6e3}
+\fancyfoot[L]{q4-Orientiation-Equivalence.md}
 \AtBeginDocument{\renewcommand{\setminus}{\mathbin{\backslash}}}
+
+\RequirePackage{silence}                  % Package that lets ignore warnings and errors for unicodechar redefining
+\WarningFilter{newunicodechar}{Redefining}
+
+\RequirePackage{newunicodechar}               % makes this remapping possible
+
+\newcommand{\mathsymbol}[2]{\newunicodechar{#1}{\ifmmode#2\else#1\fi}}
+
+\mathsymbol{ê}{\hat{e}}
+\mathsymbol{𝕊}{\mathbb{S}}
+

scripts/md-settings.yaml

+metadata:
+  author: Felix Hilsky
+variables:
+  geometry: margin=2cm
+include-in-header: ${.}/md-preamble.tex
+filters:
+  - ${.}/pandoc-gitlab-math.lua
+pdf-engine: lualatex

scripts/pandoc-call.sh

@@ -11,5 +11,7 @@ mkdir -p .maindir/out
 cp .maindir/scripts/md-preamble.tex .maindir/out/md-preamble-orig.tex
 sed -i 's#CURRENTCOMMIT#'"${headertext}"'#' .maindir/scripts/md-preamble.tex
 sed -i 's#FILENAME#'"${baseinfile}"'#' .maindir/scripts/md-preamble.tex
-pandoc --pdf-engine lualatex --lua-filter .maindir/scripts/pandoc-gitlab-math.lua --include-in-header=.maindir/scripts/md-preamble.tex "${infile}" --output="${outfile}"
+pandoc --defaults .maindir/scripts/md-settings.yaml \
+  "${infile}" \
+  --output="${outfile}"
 cp .maindir/out/md-preamble-orig.tex .maindir/scripts/md-preamble.tex