Export xsl into seperate file via embedding

functions/embedding.go

@@ -0,0 +1,25 @@
+package functions
+
+import (
+	"html/template"
+	"io"
+	"io/fs"
+)
+
+// TODO: this needs to be cached, FS reads are expensive
+func EmbedSafe(fs fs.FS) func(string) template.HTML {
+	return func(path string) template.HTML {
+		f, err := fs.Open(path)
+		if err != nil {
+			return ""
+		}
+
+		defer f.Close()
+		data, err := io.ReadAll(f)
+		if err != nil {
+			return ""
+		}
+
+		return template.HTML(data)
+	}
+}