Apply most applicable filter/custom/script lint rules to files

.luacheckrc

@@ -1,2 +1,23 @@
-std = "lua54+pandoc"
+std = "lua54"
+
+files["**/test/lua/**"] = {
+  std = "+pandoc_filter"
+}
+
+files["**/test/*.lua"] = {
+  std = "+pandoc_custom"
+}
+
+files["data/**"] = {
+  std = "+pandoc_custom"
+}
+
+files["tools/**"] = {
+  std = "+pandoc_script"
+}
+
+files["man/**"] = {
+  std = "+pandoc_script"
+}
+
 max_line_length = false