add new constants.py file for the 'set udf' epps

cg_lims/EPPs/udf/set/constants.py

@@ -0,0 +1,17 @@
+from cg_lims.enums import IntEnum
+
+
+class DefaultReadLength(IntEnum):
+    """Default read length most usually used by each flow cell type."""
+
+    FLOW_CELL_10B: int = 151
+    FLOW_CELL_25B: int = 151
+    FLOW_CELL_15B: int = 51
+
+
+class DefaultIndexLength(IntEnum):
+    """Default index length most usually used by each flow cell type."""
+
+    FLOW_CELL_10B: int = 10
+    FLOW_CELL_25B: int = 10
+    FLOW_CELL_15B: int = 8