Added support to use Pathlib (#93)

* Add support for Path objects in MarkItDown conversion methods

* Remove unnecessary blank line in test_markitdown_exiftool function

* Remove unnecessary blank line in test_markitdown_exiftool function

* remove pathlib path in test file

---------

Co-authored-by: afourney <adamfo@microsoft.com>
Co-authored-by: gagb <gagb@users.noreply.github.com>

src/markitdown/_markitdown.py

@@ -15,6 +15,7 @@ import traceback
 import zipfile
 from xml.dom import minidom
 from typing import Any, Dict, List, Optional, Union
+from pathlib import Path
 from urllib.parse import parse_qs, quote, unquote, urlparse, urlunparse
 from warnings import warn, resetwarnings, catch_warnings
 
@@ -1286,11 +1287,11 @@ class MarkItDown:
         self.register_page_converter(ZipConverter())
 
     def convert(
-        self, source: Union[str, requests.Response], **kwargs: Any
+        self, source: Union[str, requests.Response, Path], **kwargs: Any
     ) -> DocumentConverterResult:  # TODO: deal with kwargs
         """
         Args:
-            - source: can be a string representing a path or url, or a requests.response object
+            - source: can be a string representing a path either as string pathlib path object or url, or a requests.response object
             - extension: specifies the file extension to use when interpreting the file. If None, infer from source (path, uri, content-type, etc.)
         """
 
@@ -1307,10 +1308,14 @@ class MarkItDown:
         # Request response
         elif isinstance(source, requests.Response):
             return self.convert_response(source, **kwargs)
+        elif isinstance(source, Path):
+            return self.convert_local(source, **kwargs)
 
     def convert_local(
-        self, path: str, **kwargs: Any
+        self, path: Union[str, Path], **kwargs: Any
     ) -> DocumentConverterResult:  # TODO: deal with kwargs
+        if isinstance(path, Path):
+            path = str(path)
         # Prepare a list of extensions to try (in order of priority)
         ext = kwargs.get("file_extension")
         extensions = [ext] if ext is not None else []