gitignore CI/sass caches and stray editor artifacts in examples/

Change-Id: I3f1e06ebb1b867b9eda607f04dff72ba6bac23df
diff --git a/.gitignore b/.gitignore
index d09daf2..fe7ddc6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,7 @@
 inst/**/skeleton/skeleton.html
 target/
 .positai
+.gitlab-ci-local/
+.sass-cache/
+examples/#references.bib#
+examples/@inproceedings{kupietz-deliko2026,