chore: prepare for v2.0 release

- Remove bin/obj/publish from git tracking
- Update .gitignore for .NET project (source only)
- Add release.ps1 local publish script (replaces Gitea workflow)
- Remove .gitea/workflows/release.yml
- Fix duplicate group names to show library names
- Fix HTML export to show Name column in duplicates report
- Fix consolidated permissions HTML to show folder/library names

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitignore

@@ -1,10 +1,20 @@
-.claude
-*.html
-*.json
-!lang/
-!lang/*.json
-!.planning/
-!.planning/**
-!wiki/
-!wiki/*.html
-!wiki/*.md
+# Build outputs
+bin/
+obj/
+publish/
+
+# IDE
+.vs/
+*.user
+*.suo
+
+# Claude Code
+.claude/
+
+# OS
+Thumbs.db
+Desktop.ini
+
+# Secrets
+*.pfx
+appsettings.*.json