chore: migrate module path from gitlab.com to git.unbound.se

- Update go.mod module path to git.unbound.se/unboundsoftware/dbsetup
- Remove gitlab-ci-linter pre-commit hook (not applicable for Gitea)
- Update go-imports local path for new domain
- Update CLAUDE.md documentation with new paths
- Remove GitLab-specific badges from README.md

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/settings.local.json

@@ -0,0 +1,15 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(ls:*)",
+      "Bash(git -C /Users/argoyle/Source/Unbound/dbsetup log --oneline -20)",
+      "Bash(find:*)",
+      "WebSearch",
+      "Bash(git add:*)",
+      "Bash(pre-commit run:*)",
+      "Bash(go build:*)",
+      "Bash(go test:*)",
+      "Bash(but status)"
+    ]
+  }
+}