Implemented "Add" command and finished Db stuff.

Models/DbEntry.cs

@@ -1,8 +0,0 @@
-namespace TBDel.Models;
-
-// The DB entry - A list of files and folders
-public class DbEntry
-{
-    public List<FileEntry> Files { get; set; } = new();
-    public List<FolderEntry> Folders { get; set; } = new();
-}

Models/FileEntry.cs

@@ -2,7 +2,9 @@ namespace TBDel.Models;
 
 public class FileEntry
 {
-    // File path
+    // Unique 5 digit number for each entry
+    uint Id { get; set; }
+    // Absolute path
     public string Path { get; set; } = string.Empty;
     // Date added
     public DateTime DateAdded { get; set; }