add findShipDef/findModuleDef/findRecipeDef to config structs

Ships/Modules/RecipesConfig now carry lookup helpers mirroring
BuildingsConfig::findBuildingDef. The hand-rolled linear scans in
BuildingSystem, ShipSystem, ShipStatsCalculator, ThreatCostCalculator,
ShipLayoutDialog, SelectedBuildingPanel and SchematicChoiceDialog now
call them instead.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GH8ZMRY3vhxxXcaUxBqxkk

src/ui/SchematicChoiceDialog.cpp

@@ -12,15 +12,6 @@
 namespace
 {
 
-const RecipeDef* findRecipe(const RecipesConfig& recipes, const std::string& id)
-{
-    for (const RecipeDef& recipe : recipes.recipes)
-    {
-        if (recipe.id == id) { return &recipe; }
-    }
-    return nullptr;
-}
-
 QString grantKindLabel(SchematicType type)
 {
     switch (type)
@@ -120,7 +111,7 @@ SchematicChoiceDialog::SchematicChoiceDialog(
                     QLabel* recipeLabel = new QLabel(
                         QString::fromStdString(toDisplayName(recipeId)), card);
                     recipeLabel->setAlignment(Qt::AlignCenter);
-                    if (const RecipeDef* def = findRecipe(recipes, recipeId))
+                    if (const RecipeDef* def = recipes.findRecipeDef(recipeId))
                     {
                         recipeLabel->setToolTip(buildRecipeTooltip(*def));
                     }