Create generated folder in bazel_copy_generated_for_ide.sh

Minor change,

Test Plan:

Ran the script inside the container, dependencies were fetched.

GitOrigin-RevId: 91edd8babca5e506885b311cf95b4e8deb4f0525
diff --git a/scripts/bazel_copy_generated_for_ide.sh b/scripts/bazel_copy_generated_for_ide.sh
index 66a980f..bcc8488 100755
--- a/scripts/bazel_copy_generated_for_ide.sh
+++ b/scripts/bazel_copy_generated_for_ide.sh
@@ -2,4 +2,5 @@
 # Copy generated Go protobuf libraries to a place where a non-Bazel-aware IDE can find them.
 # Locally, a symlink will be sufficient.
 
+mkdir -p generated
 cp -r bazel-bin/api/*/linux_amd64_stripped/*/git.monogon.dev/source/smalltown.git/generated/* generated/