Add changelog entry for Wisconsin TANF implementation

- Add Wisconsin TANF (Wisconsin Works - W-2) implementation
- Include income eligibility rules and calculations
- Include cash assistance benefit calculation
- Include countable income determination
- Include maximum benefit amounts and group categorization

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Co-Authored-By: Claude <[email protected]>

Author: hua7450

changelog_entry.yaml

@@ -0,0 +1,8 @@
+- bump: minor
+  changes:
+    added:
+    - Wisconsin TANF (Wisconsin Works - W-2) implementation
+    - Wisconsin TANF income eligibility rules and calculations
+    - Wisconsin TANF cash assistance benefit calculation
+    - Wisconsin TANF countable income determination
+    - Wisconsin TANF maximum benefit amounts and group categorization