Fix #4902: 🐛 Fix the click of week numbers when the first day of the week is not enabled

[balajis-qb]

Closes #4902

Problem As described in the linked issue, the problem occurs when we disable the first week of the day and using excludeDateIntervals whereas the other days of the week are enabled. In this case the select of the week number is not working.

Changes

• Select the first-enabled day of the week whenever the first day of the week is disabled (Currently it's returning the first day of the week when the first day is not disabled, else it's not selecting anything)
• Added corresponding test cases to validate the changes

Contribution checklist

• [x] I have followed the contributing guidelines.
• [x] I have added sufficient test coverage for my changes.
• [x] I have formatted my code with Prettier and checked for linting issues with ESLint for code readability.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.66%. Comparing base (c1258d3) to head (f09d92d). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4903 +/- ## ========================================== + Coverage 96.65% 96.66% +0.01% ========================================== Files 28 28 Lines 3254 3264 +10 Branches 1354 1359 +5 ========================================== + Hits 3145 3155 +10 Misses 105 105 Partials 4 4 ```

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