feat: Add main application views and structure

- Implemented CreateInstanceView for creating new instances.
- Added HostsView for managing SSH hosts with CRUD operations.
- Created InstancesView for displaying and managing instances.
- Developed LogsView for viewing operation logs.
- Introduced SecretsView for managing secrets associated with hosts.
- Established SettingsView for configuring application settings.
- Created MainWindow as the main application window with navigation.
- Added app manifest and configuration files for logging and settings.

OTSSignsOrchestrator.Core/Services/IDockerCliService.cs

@@ -0,0 +1,28 @@
+using OTSSignsOrchestrator.Core.Models.DTOs;
+
+namespace OTSSignsOrchestrator.Core.Services;
+
+/// <summary>
+/// Abstraction for Docker CLI stack operations (deploy, remove, list, inspect).
+/// Implementations may use local docker CLI or SSH-based remote execution.
+/// </summary>
+public interface IDockerCliService
+{
+    Task<DeploymentResultDto> DeployStackAsync(string stackName, string composeYaml, bool resolveImage = false);
+    Task<DeploymentResultDto> RemoveStackAsync(string stackName);
+    Task<List<StackInfo>> ListStacksAsync();
+    Task<List<ServiceInfo>> InspectStackServicesAsync(string stackName);
+}
+
+public class StackInfo
+{
+    public string Name { get; set; } = string.Empty;
+    public int ServiceCount { get; set; }
+}
+
+public class ServiceInfo
+{
+    public string Name { get; set; } = string.Empty;
+    public string Image { get; set; } = string.Empty;
+    public string Replicas { get; set; } = string.Empty;
+}