Do not crash if ~/.config/litecli is not writeable.

[amjith]

Description

Fixes #172

Checklist

• [X] I've added this contribution to the CHANGELOG.md file.

[codecov-commenter]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

:exclamation: No coverage uploaded for pull request base (main@b183f86). Click here to learn what that means.

Files	Patch %	Lines
litecli/config.py	50.00%	2 Missing :warning:
litecli/main.py	50.00%	2 Missing :warning:

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #173   +/-   ##
=======================================
  Coverage        ?   61.97%           
=======================================
  Files           ?       23           
  Lines           ?     2025           
  Branches        ?        0           
=======================================
  Hits            ?     1255           
  Misses          ?      770           
  Partials        ?        0           

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