refactor(configmanager): simplify SecureStore UI with unified info view

Consolidate SecureStoreLockedFormView and SecureStoreUnlockedFormView into
a single SecureStoreInfoFormView that displays store status and metadata.
Simplifies MainWindowViewModel by removing redundant state management.
Also adds design docs for RegexTransformer feature.

NEW/src/Utils/JdeScoping.ConfigManager/Models/ConfigModel.cs

@@ -41,6 +41,16 @@ public class ConfigModel
     /// Gets or sets the connection strings for external data sources.
     /// </summary>
     public Dictionary<string, string> ConnectionStrings { get; set; } = new();
+
+    /// <summary>
+    /// Gets or sets the secure store configuration.
+    /// </summary>
+    public SecureStoreSection SecureStore { get; set; } = new();
+
+    /// <summary>
+    /// Gets or sets the pipelines configuration.
+    /// </summary>
+    public PipelinesSection Pipelines { get; set; } = new();
 }
 
 public class DataSyncSection
@@ -230,3 +240,45 @@ public class ExcelExportSection
     /// </summary>
     public string TimezoneAbbreviation { get; set; } = "CT";
 }
+
+/// <summary>
+/// Configuration section for the secure store.
+/// </summary>
+public class SecureStoreSection
+{
+    /// <summary>
+    /// Gets or sets the path to the secure store file.
+    /// </summary>
+    public string StorePath { get; set; } = "data/secrets.json";
+
+    /// <summary>
+    /// Gets or sets the path to the key file for decryption.
+    /// </summary>
+    public string KeyFilePath { get; set; } = "data/secrets.key";
+
+    /// <summary>
+    /// Gets or sets the environment variable name for the master key.
+    /// </summary>
+    public string MasterKeyEnvVar { get; set; } = "SCOPINGTOOL_MASTER_KEY";
+
+    /// <summary>
+    /// Gets or sets a value indicating whether to auto-create the store if it doesn't exist.
+    /// </summary>
+    public bool AutoCreateStore { get; set; } = true;
+
+    /// <summary>
+    /// Gets or sets the list of required secret keys that must exist in the store.
+    /// </summary>
+    public List<string> RequiredKeys { get; set; } = [];
+}
+
+/// <summary>
+/// Configuration section for pipelines.
+/// </summary>
+public class PipelinesSection
+{
+    /// <summary>
+    /// Gets or sets the path to the pipelines configuration file.
+    /// </summary>
+    public string ConfigPath { get; set; } = "Pipelines/pipelines.json";
+}