added new functions to access chapter and item by name in costs catalog

hub/catalog_factories/data_models/cost/capital_cost.py

@@ -38,3 +38,13 @@ class CapitalCost:
     :return: float
     """
     return self._overhead_and_profit
+
+  def chapter(self, name) -> Chapter:
+    """
+    Get specific chapter by name
+    :return: Chapter
+    """
+    for chapter in self.general_chapters:
+      if chapter.chapter_type == name:
+        return chapter
+    raise KeyError(f'Chapter name {name} not found')

hub/catalog_factories/data_models/cost/chapter.py

@@ -30,3 +30,13 @@ class Chapter:
     :return: [str]
     """
     return self._items
+
+  def item(self, name) -> ItemDescription:
+    """
+    Get specific item by name
+    :return: ItemDescription
+    """
+    for item in self.items:
+      if item.type == name:
+        return item
+    raise KeyError(f'Item name {name} not found')