feat: mp_ds2inserts macro for creating programs for inserting data (and corresponding test)

tests/base/mp_ds2inserts.test.sas

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+/**
+  @file
+  @brief Testing mp_ds2inserts.sas macro
+
+  <h4> SAS Macros </h4>
+  @li mp_ds2inserts.sas
+  @li mp_assert.sas
+
+**/
+
+/**
+  * test 1 - rebuild an existing dataset
+  * Cars is a great dataset - it contains leading spaces, and formatted numerics
+  */
+
+%mp_ds2inserts(sashelp.cars,outref=testref,outlib=work,outds=test)
+
+data work.test;
+  set sashelp.cars;
+  stop;
+proc sql;
+%inc testref;
+
+proc compare base=sashelp.cars compare=work.test;
+quit;
+
+%mp_assert(
+  iftrue=(&sysinfo=1),
+  desc=sashelp.cars is identical except for ds label,
+  outds=work.test_results
+)