add gvisor-mwe and add binary sizes to README

examples/_import_examples/README.md

@@ -0,0 +1,8 @@
+# import-examples
+This folder contains examples that need external imports to work. 
+
+This is done to avoid adding dependencies to lneto's go.mod file.
+- Trivial Auditing
+    - No dependency analysis needed for vulnerability scanning
+- Eliminate a whole set of attack vectors for lneto importers
+- Ensures nothing outside Lneto gets compiled maintaining binary sizes small