add method from_huggingface_tokenizer for RecursiveCharacterTextSplitter within HTMLSemanticPreservingSplitter

### Submission checklist - [x] This is a feature request, not a bug report or usage question. - [x] I added a clear and descriptive title that summarizes the feature request. - [x] I used the GitHub search to find a similar feature request and didn't find it. - [x] I checked the LangChain documentation and API reference to see if this feature already exists. - [x] This is not related to the langchain-community package. ### Package (Required) - [ ] langchain - [ ] langchain-openai - [ ] langchain-anthropic - [ ] langchain-classic - [ ] langchain-core - [ ] langchain-model-profiles - [ ] langchain-tests - [x] langchain-text-splitters - [ ] langchain-chroma - [ ] langchain-deepseek - [ ] langchain-exa - [ ] langchain-fireworks - [ ] langchain-groq - [ ] langchain-huggingface - [ ] langchain-mistralai - [ ] langchain-nomic - [ ] langchain-ollama - [ ] langchain-openrouter - [ ] langchain-perplexity - [ ] langchain-qdrant - [ ] langchain-xai - [ ] Other / not sure / general ### Feature Description as title say, there is a RecursiveCharacterTextSplitter inside HTMLSemanticPreservingSplitter, which will be creat when HTMLSemanticPreservingSplitter be created, but it not allowed to be created by method from_huggingface_tokenizer or other method. i hope add some classmethod like from_huggingface_tokenizer and other for HTMLSemanticPreservingSplitter ### Use Case if i must do that, i have to change source code, if i can create a HTMLSemanticPreservingSplitter like: ```python html_splitter = HTMLSemanticPreservingSplitter.from_huggingface_tokenizer( headers_to_split_on=[("h1", "Header 1"), ("h2", "Header 2")], tokenizer=qwen_tokenizer, max_chunk_size=chunk_size_tokens, chunk_overlap=chunk_overlap_tokens, separators=["\n\n", "\n", "。", "！", "？", "；", "，"] ) ``` it will be helpful ### Proposed Solution _No response_ ### Alternatives Considered _No response_ ### Additional Context _No response_