📦️ [chore] Update project for TexTeller 3.0 release

- Update dataset references from TexTeller 1.0 to 3.0 in README files
- Add paper.pdf to assets directory
- Configure pre-commit to exclude assets/ from large file checks

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.pre-commit-config.yaml

@@ -17,6 +17,7 @@ repos:
       - id: check-yaml
       - id: check-toml
       - id: check-added-large-files
+        exclude: assets/
       - id: check-case-conflict
       - id: check-merge-conflict
       - id: debug-statements