refactor: rename core.search to core.stringhelpers

src/app/app.notepad.pas

@@ -39,7 +39,7 @@ uses
     driver.storage.types,
     driver.storage.filedispatch,
     core.strings,
-    core.search,
+    core.stringhelpers,
     io.syslog,
     io.stdio,
     debug.tracer,