feat(configmanager): add config set and connection update CLI commands

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.

NEW/tests/Utils/JdeScoping.ConfigManager.Cli.Tests/ConsoleTestCollection.cs

@@ -0,0 +1,10 @@
+namespace JdeScoping.ConfigManager.Cli.Tests;
+
+/// <summary>
+/// Collection definition for tests that redirect Console.Out or Console.Error.
+/// These tests must run sequentially to avoid interference.
+/// </summary>
+[CollectionDefinition("Console Tests", DisableParallelization = true)]
+public class ConsoleTestCollection
+{
+}