feat: mp_gitlog and associated test/docs

tests/base/mp_gitlog.test.sas

@@ -0,0 +1,32 @@
+/**
+  @file
+  @brief Testing mp_gitlog.sas macro
+
+  <h4> SAS Macros </h4>
+  @li mf_nobs.sas
+  @li mp_gitlog.sas
+  @li mp_assert.sas
+  @li mp_assertscope.sas
+
+**/
+
+/* grab core repo */
+%let gitdir=%sysfunc(pathname(work))/core;
+%let repo=https://github.com/sasjs/core;
+%put source clone rc=%sysfunc(GITFN_CLONE(&repo,&gitdir));
+
+%mp_assertscope(SNAPSHOT)
+%mp_gitlog(&gitdir,outds=work.test1)
+%mp_assertscope(COMPARE)
+
+%mp_assert(
+  iftrue=(&syscc=0),
+  desc=Regular test works,
+  outds=work.test_results
+)
+
+%mp_assert(
+  iftrue=(%mf_nobs(work.test1)>1000),
+  desc=output has gt 1000 rows,
+  outds=work.test_results
+)