Prerelease v0.0.3

v0.0.3 introduces these changes:

1. Introduces TokenizerInfo to uniformly handle various tokenizers, including huggingface tokenizer, tiktoken and mlc-llm tokenizer-cpp.
2. Introduces GrammarMatcherInitContext, an object that can be used to fast initialize multiple GrammarMatchers. A cache for GrammarMatcherInitContext called GrammarMatcherInitContextCache is introduces as well.
3. Introduces WebAssembly bindings for web uses.
4. Documents are refined for clearity.

Several new features and bug fixes are introduced as well.

Prerelease v0.0.2

The first pre-release version of xgrammar. Ensures basic functionality and provides good performance.