Add X25519 example in python and CI

.github/workflows/test_basic.yaml

@@ -91,6 +91,14 @@ jobs:
     - name: Run examples
       run: |
         python3 example.py --examples ntt_kyber_123_4567_a55,ntt_dilithium_123_45678_a55 --timeout=300
+  examples_x25519_a55:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: ./.github/actions/setup-ubuntu
+    - name: Run examples
+      run: |
+        python3 example.py --examples x25519_scalarmult_ci_a55
   sqmag:
     runs-on: ubuntu-latest
     steps:

example.py

@@ -52,6 +52,9 @@
 from examples.naive.aarch64.keccak._example import (
     example_instances as example_instances_aarch64_keccak,
 )
+from examples.naive.aarch64.x25519._example import (
+    example_instances as example_instances_aarch64_x25519,
+)
 
 from examples.naive.armv7m.dilithium._example import (
     example_instances as example_instances_armv7m_dilithium,
@@ -115,6 +118,7 @@ def main():
         + example_instances_aarch64_dilithium
         + example_instances_aarch64_kyber
         + example_instances_aarch64_keccak
+        + example_instances_aarch64_x25519
         + example_instances_armv8m_kyber
         + example_instances_armv8m_dilithium
         + example_instances_armv8m_flt_r4_fft