add ci and move docs

Author: ncldmg

.github/workflows/test.yml

@@ -0,0 +1,26 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Zig
+        uses: goto-bus-stop/setup-zig@v2
+        with:
+          version: 0.15.1
+
+      - name: Build project
+        run: make build
+
+      - name: Run all tests
+        run: sudo make test-all

E2E_TESTS.md

@@ -1,5 +1,7 @@
 # zafxdp - AF_XDP for Zig
 
+[![Tests](https://github.com/ncldmg/zafxdp/actions/workflows/test.yml/badge.svg)](https://github.com/ncldmg/zafxdp/actions/workflows/test.yml)
+
 A pure Zig implementation of AF_XDP (Address Family XDP) sockets with eBPF program loading, featuring both **low-level** and **high-level** APIs for building high-performance networking applications.
 
 ## Key Features