Add .doc file parser.

[chrysanthemum-boy]

What problem does this PR solve?

Add .doc file parser, using tika.

pip install tika

from tika import parser
from io import BytesIO

def extract_text_from_doc_bytes(doc_bytes):
    file_like_object = BytesIO(doc_bytes)
    parsed = parser.from_buffer(file_like_object)
    return parsed["content"]

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):