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>

Sharepoint_Settings.json

@@ -0,0 +1,4 @@
+{
+  "dataFolder": "C:\\Users\\SebastienQUEROL\\Documents\\SPToolbox",
+  "lang": "en"
+}