Implemented template crud, db entities, import/export, ptero and pelican import

MoonlightServers.Api/Infrastructure/Database/Entities/Template.cs

@@ -0,0 +1,43 @@
+using System.ComponentModel.DataAnnotations;
+using MoonlightServers.Api.Infrastructure.Database.Json;
+
+namespace MoonlightServers.Api.Infrastructure.Database.Entities;
+
+public class Template
+{
+    public int Id { get; set; }
+
+    // Meta
+    
+    [MaxLength(30)]
+    public string Name { get; set; }
+    
+    [MaxLength(255)]
+    public string Description { get; set; }
+    
+    [MaxLength(30)]
+    public string Author { get; set; }
+    
+    [MaxLength(30)]
+    public string Version { get; set; }
+    
+    [MaxLength(2048)]
+    public string? UpdateUrl { get; set; }
+    
+    [MaxLength(2048)]
+    public string? DonateUrl { get; set; }
+    
+    // JSON Options
+    public FilesConfig FilesConfig { get; set; }
+    public LifecycleConfig LifecycleConfig { get; set; }
+    public InstallationConfig InstallationConfig { get; set; }
+    public MiscellaneousConfig MiscellaneousConfig { get; set; }
+
+    // Docker Images
+    public bool AllowUserDockerImageChange { get; set; }
+    public TemplateDockerImage? DefaultDockerImage { get; set; }
+    public List<TemplateDockerImage> DockerImages { get; set; } = new();
+    
+    // Variables
+    public List<TemplateVariable> Variables { get; set; } = new();
+}