Add missing CLI commands to match UI capabilities: config set commands for
all configuration sections (datasync, dataaccess, auth, ldap, search,
excelexport) and connection update command. Also adds unit tests for
SecretCommands, ValidateCommand, and TestConnectionCommand.
Expand ConfigManager.Cli with pipeline, config, backup, and connection commands
to match the feature set of ConfigManager.Ui, plus README documentation.
Joseph Doherty