add ci

Author: Zhugy-8086

.github/workflows/ci.yml

@@ -0,0 +1,13 @@
+name: verify
+on: [push, pull_request]
+jobs:
+  verify:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with: { python-version: '3.12' }
+      - run: pip install -r requirements.txt
+      - run: python verification/validate_math_tree_softmax.py
+      - run: python verification/validate_math_vapo_discrete_learning.py
+      - run: python verification/validate_math_tree_softmax_torch.py