feat(socket-proxy): implement Docker socket proxy and related configurations

- Updated Dockerfile and Makefile for socket-proxy build.
- Modified go.mod to include necessary dependencies.
- Updated CI workflows for socket-proxy integration.
- Better module isolation
- Code refactor

.github/workflows/docker-image-nightly.yml

@@ -15,9 +15,10 @@ jobs:
     with:
       image_name: ${{ github.repository_owner }}/godoxy
       tag: nightly
+      target: main
   build-nightly-agent:
     uses: ./.github/workflows/docker-image.yml
     with:
       image_name: ${{ github.repository_owner }}/godoxy-agent
       tag: nightly
-      agent: true
+      target: agent