feat: creating new mx_ suite of macros!

also adding new mx_getcode macro

base/mf_getplatform.sas

@@ -5,8 +5,12 @@
 
       %put %mf_getplatform();
 
-    returns:
-      SASMETA  (or SASVIYA)
+  returns one of:
+
+  @li SASMETA
+  @li SASVIYA
+  @li SASJS
+  @li BASESAS
 
   @param switch the param for which to return a platform specific variable
 
@@ -68,4 +72,4 @@
 %else %if &switch=VIYARESTAPI %then %do;
   %mf_trimstr(%sysfunc(getoption(servicesbaseurl)),/)
 %end;
-%mend mf_getplatform;
+%mend mf_getplatform;