chore<ci>: add func test

.github/workflows/runtest.yml

@@ -0,0 +1,28 @@
+name: Functional Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: "1.23"
+      - name: Build Sif
+        run: make
+      - name: Run Sif with features
+        run: |
+          ./sif -u https://google.com -dnslist small -dirlist small -ports common -dork -git -whois -cms
+          if [ $? -eq 0 ]; then
+            echo "Sif ran successfully"
+          else
+            echo "Sif exited with an error"
+            exit 1
+          fi