Update version to 8.6.0

[JimKerslake]

Summary

• Updated version from 8.5 to 8.6.0 in all project files
• Updated PowerShell version script with new version numbers
• Core projects build successfully (authentication issues with external dependencies noted)

Files Affected

• update_version.ps1
• src/cloudscribe.Logging/cloudscribe.Logging.csproj
• src/cloudscribe.Logging.EFCore.Common/cloudscribe.Logging.EFCore.Common.csproj
• src/cloudscribe.Logging.EFCore.MSSQL/cloudscribe.Logging.EFCore.MSSQL.csproj
• src/cloudscribe.Logging.EFCore.MySql/cloudscribe.Logging.EFCore.MySql.csproj
• src/cloudscribe.Logging.EFCore.PostgreSql/cloudscribe.Logging.EFCore.PostgreSql.csproj
• src/cloudscribe.Logging.EFCore.SQLite/cloudscribe.Logging.EFCore.SQLite.csproj
• src/cloudscribe.Logging.NoDb/cloudscribe.Logging.NoDb.csproj
• src/cloudscribe.Logging.Web/cloudscribe.Logging.Web.csproj
• src/Demo.WebApp/Demo.WebApp.csproj
• src/WebAppMvc/WebAppMvc.csproj

Test plan

• PowerShell version script executed successfully (10 projects updated)
• Core projects build without errors
• All package references updated correctly

🤖 Generated with Claude Code