Add HTML Page Title to Element Metadata in partition_html()

[prasannaJosium]

Description:
Currently, when using partition_html(), the metadata of elements doesn't include the HTML page title, which is a valuable piece of information that could be useful for many use cases. The title is available in the HTML document's <title> tag but isn't being extracted and included in the element metadata.

Proposed Solution:
Add a page_title field to the ElementMetadata class and modify the partition_html() function to extract and include the page title in the metadata of each element. This would involve:

1. Adding page_title: Optional[str] = None to the ElementMetadata class
2. Adding the title to the consolidation strategies with FIRST strategy
3. Extracting the title from the HTML document and setting it in the metadata

Benefits:

• Provides consistent access to the page title across all elements
• Useful for document organization and categorization
• Useful in RAG application that needs page title in citations
• Helps maintain context when processing multiple documents
• No additional dependencies required (can use existing BeautifulSoup parser)

Example Usage:

elements = partition_html(url="https://example.com")
for element in elements:
    print(f"Page Title: {element.metadata.page_title}")

Would you like me to submit a PR with these changes?

If there are other ways to get his done, please do educate.

Cheers