fix: prevent infinite whitespace in grammar rules (fixes #93)

Adding Support for Literal types

Add PHI_4 chat template

Fix Trailing Bracket in GBNF generation

Update `llama_cpp_server.py` fixing bugs with non-streaming response

Add Mistral templates that more closely resemble the standard

Added py.typed

Print grammar only if verbose is True

Add: DeepseekCoder v2 chat format

Fix GEMMA_2, LLAMA_3, and PHI_3 MessagesFormatter