Add missing cities for south sudan

[tomi3-11]

This pull request expands the search preset for South Sudan to include additional relevant keywords and locations. This will help ensure that queries using this preset capture a broader set of results related to South Sudan.

Preset improvements:

• Expanded the include list for the "South Sudan" preset in presets.go to add "south+sudan", "yei", "wau", "aweil", "jonglei", and "maridi" alongside the existing terms.

[Copilot]

Pull request overview

This pull request enhances the South Sudan preset by expanding its search coverage to include additional significant cities and an alternative country name format. The changes align with the existing pattern of including multiple cities and regions in country presets to capture a broader set of search results.

Key changes:

• Adds 5 new cities (Yei, Wau, Aweil, Maridi) and 1 state (Jonglei) to the South Sudan preset
• Includes URL-encoded variant "south+sudan" alongside the existing "south sudan" term

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[ashkulz]

@tomi3-11 why did you add south+sudan when south sudan is already there?

[tomi3-11]

I wanted to expand the search to eliminate Sudan if searching for " South Sudan" I think that can be eliminated.

[ashkulz]

Thanks for the contribution, @tomi3-11!

[tomi3-11]

@ashkulz my pleasure