feat: scaffold Go project with cobra CLI, Makefile, and config

Set up the Go module, directory structure, and minimal CLI entrypoint
for the awesome-docker Go rewrite. Includes:
- cobra-based CLI with version command
- Makefile with build/test/lint/check/health/report/clean targets
- config/exclude.yaml migrated from tests/exclude_in_test.json
- config/website.tmpl.html copied from website/index.tmpl.html
- .gitignore updated for Go binary

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

config/exclude.yaml

@@ -0,0 +1,18 @@
+# URLs or URL prefixes to skip during link checking.
+# These are known false positives or rate-limited domains.
+domains:
+  - https://vimeo.com
+  - https://travis-ci.org/veggiemonk/awesome-docker.svg
+  - https://github.com/apps/
+  - https://twitter.com
+  - https://www.meetup.com/
+  - https://cycle.io/
+  - https://www.manning.com/
+  - https://deepfence.io
+  - https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg
+  - https://www.se-radio.net/2017/05/se-radio-episode-290-diogo-monica-on-docker-security
+  - https://www.reddit.com/r/docker/
+  - https://www.udacity.com/course/scalable-microservices-with-kubernetes--ud615
+  - https://www.youtube.com/playlist
+  - https://www.aquasec.com
+  - https://cloudsmith.com