Links (#615)

* add URL support to Label element and XML parsing

* refactor Label URL handling to use getter method in setURL

* implement URL opening confirmation dialog and platform-specific URL handling

* fix: fixed build errors

* remove: delete test link label from worlds.xml

* refactor: remove URL handling from Label class and XML parsing

* refactor: clean up Label class by removing unnecessary whitespace and improving code readability

* refactor: remove unused URL member from Label class

* refactor: remove unused URL attribute from XML UI documentation and related code

* refactor: improve code readability by adding whitespace and formatting adjustments in Label class

* refactor: improve whitespace consistency in Label class and add URL opening functionality in libcore

res/texts/uz_UZ.txt

@@ -24,6 +24,7 @@ Save=Saqlash
 Grant %{0} pack modification permission?=%{0} to‘plamini o‘zgartirish ruxsatini berilsinmi?
 Error at line %{0}=%{0}-qatorida xatolik
 Run=Ishga tushirish
+Are you sure you want to open the link: =Haqiqatan ham havolani ochmoqchimisiz: 
 
 editor.info.tooltip=CTRL+S - Saqlash\nCTRL+R - Ishga tushirish\nCTRL+Z - Bekor qilish\nCTRL+Y - Qayta bajarish
 devtools.traceback=Chaqiruvlar steki (so`nggisidan boshlab)