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.
Rename ConfigManager to ConfigManager.Ui to match the Core/CLI/UI project
structure, and split the monolithic test project into Core.Tests,
Cli.Tests, and Ui.Tests to align with the source project organization.
Joseph Doherty