feat(*): recreate library as scoped package

make_singlefile.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+# Concatenate all macros into a single file
+
+OUTFILE='./macrocore.sas'
+
+cat > $OUTFILE <<'EOL'
+/**
+  @file
+  @brief Auto-generated file
+  @details
+    This file contains all the macros in a single file - which means it can be
+    'included' in SAS with just 2 lines of code:
+
+      filename mc url
+        "https://raw.githubusercontent.com/macropeople/macrocore/master/macrocore.sas";
+      %inc mc;
+
+    The `build.sh` file in the https://github.com/macropeople/macrocore repo
+    is used to create this file.
+
+  @author Allan Bowe
+**/
+EOL
+
+cat base/* >> $OUTFILE
+cat meta/* >> $OUTFILE
+cat metax/* >> $OUTFILE
+cat viya/* >> $OUTFILE