Explicitly set Khoj to use the default locale of the user (#425)

- Explicitly set locale using `locale.setLocale(locale.LC_ALL, '')` for localization. Relevant for datetime libraries. See [Python 3 documentation](https://docs.python.org/3/library/locale.html#locale.setlocale).

src/khoj/main.py

@@ -2,6 +2,7 @@
 import os
 import signal
 import sys
+import locale
 
 if sys.stdout is None:
     sys.stdout = open(os.devnull, "w")
@@ -32,6 +33,9 @@ from khoj.utils.cli import cli
 # Initialize the Application Server
 app = FastAPI()
 
+# Set Locale
+locale.setlocale(locale.LC_ALL, "")
+
 # Setup Logger
 rich_handler = RichHandler(rich_tracebacks=True)
 rich_handler.setFormatter(fmt=logging.Formatter(fmt="%(message)s", datefmt="[%X]"))