nxcdb: add page (#14386)

pages/common/nxcdb.md

@@ -0,0 +1,20 @@
+# nxcdb
+
+> Interact with the NetExec database.
+> More information: <https://www.netexec.wiki/getting-started/database-general-usage>.
+
+- Enter an interactive database session:
+
+`nxcdb`
+
+- Display the currently active workspace:
+
+`nxcdb --get-workspace`
+
+- Create a new workspace:
+
+`nxcdb --create-workspace {{workspace_name}}`
+
+- Activate the specified workspace:
+
+`nxcdb --set-workspace {{workspace_name}}`