feat: creating new mx_ suite of macros!

also adding new mx_getcode macro

tests/base/mp_deletefolder.test.sas

@@ -0,0 +1,50 @@
+/**
+  @file
+  @brief Testing mp_deletefolder.sas macro
+
+  <h4> SAS Macros </h4>
+  @li mp_deletefolder.sas
+  @li mf_mkdir.sas
+  @li mf_nobs.sas
+  @li mp_assert.sas
+  @li mp_dirlist.sas
+
+**/
+
+/**
+  * make a directory structure
+  */
+
+%let root=%sysfunc(pathname(work))/top;
+%mf_mkdir(&root)
+%mf_mkdir(&root/a)
+%mf_mkdir(&root/b)
+%mf_mkdir(&root/a/d)
+%mf_mkdir(&root/a/e)
+%mf_mkdir(&root/a/e/f)
+data "&root/a/e/f/ds1.sas7bdat";
+  x=1;
+run;
+
+%mp_dirlist(path=&root, outds=myTable, maxdepth=MAX)
+
+%mp_assert(
+  iftrue=(%mf_nobs(work.mytable)=6),
+  desc=Temp data successfully created,
+  outds=work.test_results
+)
+
+%mp_deletefolder(&root/a)
+
+%mp_dirlist(path=&root, outds=work.myTable2, maxdepth=MAX)
+
+data _null_;
+  set work.mytable2;
+  putlog (_all_)(=);
+run;
+
+%mp_assert(
+  iftrue=(%mf_nobs(work.mytable2)=1),
+  desc=Subfolder and contents successfully deleted,
+  outds=work.test_results
+)