chore: add basic codeql config

Signed-off-by: Olivier Vernin <me@olblak.com>

Author: olblak

.github/codeql/codeql-config.yml

@@ -0,0 +1,10 @@
+name: "CodeQL config"
+queries:
+  # Run all extra query suites, both because we want to
+  # and because it'll act as extra testing. This is why
+  # we include both even though one is a superset of the
+  # other, because we're testing the parsing logic and
+  # that the suites exist in the codeql bundle.
+  - uses: security-and-quality
+  - uses: security-experimental
+  - uses: security-extended