[Feature] Improve Country Search with Weighted Ranking in _filterCountries()

[kunalbedi-pfg]

closes #1922

This PR enhances the country search functionality in _filterCountries() by implementing a weighted ranking strategy for search results. The new logic ensures that countries are displayed in the following order based on assigned weightage:

1. Countries where the ISO2 code matches the search query exactly.
2. Countries whose names start with the search query.
3. Countries whose names contain the search query anywhere.
4. Countries where the full dial code matches the query.
5. Countries where the country initials match the query.

This update significantly improves search result relevance and user experience.

[kunalbedi-pfg]

@jackocnr - I hope you’re doing well. When you have a moment, could you kindly review this PR? It is currently blocking our progress, and we would greatly appreciate your feedback. Please let us know if any changes are required, or if everything looks good, we would appreciate your approval.

[kunalbedi-pfg]

@jackocnr - I hope you’re doing well. Could you kindly review this PR as soon as possible as it is currently blocking our progress, and we would greatly appreciate your feedback. Please let us know if any changes are required, or if everything looks good, we would appreciate your approval. Thank you!

[jackocnr]

Hi there, thanks for putting this together - I look forward to reviewing this and hopefully getting it merged and released ASAP. Unfortunately, I have very limited time to commit to open-source over the next month or so, due to life commitments. So most likely I will only get to this in late March. Apologies for the delay. You shouldn't let this block you though - you should just switch to using your version for now, and then later when we get this merged into master, you can switch back again.

[kunalbedi-pfg]

Sure, thank you for your comment. We will wait for late march for this to get merged.