Update .gitignore

added temp files generated by this repo

Author: nedmsmith

.gitignore

@@ -1,3 +1,14 @@
 ./cddl/*-autogen.cddl
 draft-ietf-rats-corim
-*.cddl.bak
+*.cddl.bak
+*.pretty
+*.cbor
+eat-autogen.cddl
+ce-autogen.cddl
+comidx-autogen.cddl
+cose-autogen.cddl
+spdm-autogen.cddl
+/imports
+/exports
+/imports
+.mailmap