refactor(gitignore): simplify HF pack exclusions with wildcard pattern

Replace individual pack directory listings with a single wildcard rule
to exclude `packs/warbler-pack-hf-*/*chunk*.jsonl` files, maintaining
deployment size under 1GB by consistently ignoring all HF language packs.

.gitignore

@@ -47,13 +47,7 @@ results/
 
 # HuggingFace language packs (downloaded on-demand)
 # Exclude all HF packs to keep deployment size under 1GB
-packs/warbler-pack-hf-arxiv/*chunk*.jsonl
-packs/warbler-pack-hf-enterprise/
-packs/warbler-pack-hf-edustories/
-packs/warbler-pack-hf-manuals/
-packs/warbler-pack-hf-novels/
-packs/warbler-pack-hf-portuguese-edu/
-packs/warbler-pack-hf-prompt-report/
+packs/warbler-pack-hf-*/*chunk*.jsonl
 packs/debug-*/
 packs/test-*/
 packs/ingestion_report_*.json