reporting: add graph option to change title font size

@graph/graph.m

@@ -37,6 +37,7 @@ o.series = {};
 
 o.title = '';
 o.titleFormat = '';
+o.titleFontSize = 'normalsize'
 o.ylabel = '';
 o.xlabel = '';
 
@@ -149,10 +150,12 @@ valid_legend_locations = ...
 assert(any(strcmp(o.legendLocation, valid_legend_locations)), ...
        ['@graph.graph: legendLocation must be one of ' strjoin(valid_legend_locations, ' ')]);
 
-valid_legend_font_sizes = {'tiny', 'scriptsize', 'footnotesize', 'small', ...
+valid_font_sizes = {'tiny', 'scriptsize', 'footnotesize', 'small', ...
                     'normalsize', 'large', 'Large', 'LARGE', 'huge', 'Huge'};
-assert(any(strcmp(o.legendFontSize, valid_legend_font_sizes)), ...
-       ['@graph.graph: legendFontSize must be one of ' strjoin(valid_legend_font_sizes)]);
+assert(any(strcmp(o.legendFontSize, valid_font_sizes)), ...
+       ['@graph.graph: legendFontSize must be one of ' strjoin(valid_font_sizes)]);
+assert(any(strcmp(o.titleFontSize, valid_font_sizes)), ...
+       ['@graph.graph: titleFontSize must be one of ' strjoin(valid_font_sizes)]);
 
 valid_legend_orientations = {'vertical', 'horizontal'};
 assert(any(strcmp(o.legendOrientation, valid_legend_orientations)), ...

@graph/writeGraphFile.m

@@ -189,6 +189,10 @@ if ~isempty(o.miscTikzAxisOptions)
 end
 fprintf(fid, ']\n');
 
+if ~isempty(o.title{1})
+    fprintf(fid, '\\tikzstyle{every axis title}=[font=\\%s]\n', o.titleFontSize);
+end
+
 if ~isempty(o.shade)
     fprintf(fid, '%%shading\n');
     stringsdd = strings(dd);