feat: adding mpe_security to documented tables

docs/tables/mpe_security.md

@@ -0,0 +1,23 @@
+---
+layout: article
+title: MPE_SECURITY
+description: The MPE_SECURITY table determines which GROUPS can VIEW, EDIT, or APPROVE which tables or libraries
+og_title: MPE_SECURITY Table Documentation
+og_image: img/securitytable.png
+---
+
+# MPE_SECURITY
+
+The MPE_SECURITY table determines which GROUPS can VIEW, EDIT, or APPROVE which tables or libraries
+
+![Screenshot](img/securitytable.png)
+
+
+## Columns
+
+ - 🔑 `TX_FROM num`: SCD2 open datetime
+ - 🔑 `LIBREF char(8)`: The LIBREF of the target table
+ - 🔑 `DSN char(32)`: The name of the target dataset (or format catalog)
+ - 🔑 `ACCESS_LEVEL char(100)`: Either VIEW, EDIT or APPROVE
+ - 🔑 `SAS_GROUP char(100)`: The SAS Group to which to provide access
+ - `TX_TO num`: SCD2 close datetime