v0.1.11

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In this PR we supported the structural tag. This is a new feature that can support strict function calling (and many more flexible patterns).

What's Changed

• [Feature] Structural tag by @Ubospica in #162
• [Fix] Fix #162 by @Ubospica in #163
• [Fix] Fix broken rollback char count after accepting stop token by @benchislett in #161
• [Feature] Optional Token Bitmask by @Ubospica in #165

Full Changelog: v0.1.10...v0.1.11