Add SOI congressional district source package (#45)

Author: MaxGhenis

arch/source_package.py

@@ -131,6 +131,9 @@
     ),
     "soi-table-4-3": Path("irs_soi/table_4_3"),
     "soi-state-2022": Path("irs_soi/state_2022"),
+    "soi-congressional-district-2022": Path(
+        "irs_soi/congressional_district_2022"
+    ),
     "soi-historic-table-2": Path("irs_soi/historic_table_2"),
     "soi-historic-table-2-state-agi-2022": Path(
         "irs_soi/historic_table_2_state_agi_2022"