.github/workflows: Add checks for GitHub PRs

Adds linter, unittests and copyright checks for public GitHub PRs

Change-Id: Ifa1d145a5b321e79bc0354784cf47970ab0008c1

Author: rstatkevych-arista

.github/workflows/pr_checks.yml

@@ -0,0 +1,42 @@
+name: Run checks on PR
+on:
+  push:
+    branches: [ "trunk" ]
+  pull_request:
+    branches: [ "trunk" ]
+
+jobs:
+  Linter:
+    runs-on: ubuntu-latest
+    container:
+      image: python:3.12
+    steps:
+    - uses: actions/checkout@v4
+    - name: Prepare python environment
+      run: |
+        pip install --no-cache-dir "cython<3.0.0"
+        pip install --no-cache-dir -r requirements.txt -r requirements-dev.txt
+        pip install .
+    - name: Run linter
+      run: flake8 .
+
+  Test-Runner:
+    runs-on: ubuntu-latest
+    container:
+      image: python:3.12
+    steps:
+    - uses: actions/checkout@v4
+    - name: Prepare python environment
+      run: |
+        pip install --no-cache-dir "cython<3.0.0"
+        pip install --no-cache-dir -r requirements.txt -r requirements-dev.txt
+        pip install .
+    - name: Run Tests
+      run: pytest
+
+  Copyright:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Run copyright checker
+      run: ./check_copyright.sh