Test: Add unit tests for useSettingsInternal hook

[anandxs]

Description

This PR introduces unit tests for the useSettingsInternal hook. These tests cover the hook's behavior, including returning settings, updating settings using helper functions, and handling edge cases like empty fields.

Closes #131

What change does this PR introduce?

Please select the relevant option(s).

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update (changes to docs/code comments)

What is the proposed approach?

The proposed approach involves writing unit tests for useSettingsInternal. The tests use renderHook to test the hook's output and behavior, mocking necessary context and utility functions to ensure the correct configuration flow when settings are updated.

Checklist:

• The commit message follows our adopted guidelines
• Testing has been done for the change(s) added (for bug fixes/features)
• Relevant comments/docs have been added/updated (for bug fixes/features)

[tjtanjin]

LGTM! 😊