Implemented "Add" command and finished Db stuff.

Commands/AddCommand.cs

@@ -0,0 +1,63 @@
+using Microsoft.Extensions.Logging;
+using TBDel.Models;
+using TBDel.Services;
+
+namespace TBDel.Commands;
+
+public class AddCommand
+{
+
+    public static async Task<Boolean> AddEntry(string[] args)
+    {
+        // TODO: Add unique Id support
+        // TODO: Add duplicate path check
+        // TODO: Add support for multiple paths
+
+        if (args.Length > 1)
+        {
+            string workingDirectory = Directory.GetCurrentDirectory();
+            string absolutePath = Path.Combine(workingDirectory, args[1]);
+            if (File.Exists(absolutePath))
+            {
+                Console.WriteLine($"Adding: {absolutePath}");
+                var entry = new FileEntry { Path = absolutePath, DateAdded = DateTime.Now };
+                var dbService = new DbService();
+                if (await dbService.AddFileEntryAsync(entry))
+                {
+                    Console.ForegroundColor = ConsoleColor.Green;
+                    Console.WriteLine("File added successfully.");
+                    Console.ResetColor();
+                    return true;
+                }
+                else
+                {
+                    Console.ForegroundColor = ConsoleColor.Red;
+                    Console.WriteLine("Failed to add file.");
+                    Console.ResetColor();
+                    return false;
+                }
+            }
+            else if (Directory.Exists(absolutePath))
+            {
+                Console.WriteLine($"Adding: {absolutePath}");
+                var entry = new FolderEntry() { Path = absolutePath, DateAdded = DateTime.Now };
+                var dbService = new DbService();
+                if (await dbService.AddFolderEntryAsync(entry))
+                {
+                    Console.ForegroundColor = ConsoleColor.Green;
+                    Console.WriteLine("Directory added successfully.");
+                    Console.ResetColor();
+                    return true;
+                }
+                else
+                {
+                    Console.ForegroundColor = ConsoleColor.Red;
+                    Console.WriteLine("Failed to add directory.");
+                    Console.ResetColor();
+                    return false;
+                }
+            }
+        }
+        return false;
+    }
+}

Commands/HelpCommand.cs

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+
+namespace TBDel.Commands;
+
+public static class HelpCommand
+{
+    // Show the help message
+    /// <summary>
+    /// Shows the help message.
+    /// </summary>
+    /// <param name="showOnWrongCommand">If true, displays an error message indicating that an invalid command was entered.</param>
+    public static void Show(
+        Boolean showOnWrongCommand = false)
+    {
+        if (showOnWrongCommand)
+        {
+            Console.ForegroundColor = ConsoleColor.Red;
+            Console.Error.WriteLine("Invalid command. Use 'tbdel help' for help.");
+            Console.ResetColor();
+        }
+        Console.WriteLine("Usage: tbdel <command> [arguments]");
+        Console.WriteLine("Available commands:");
+        Console.WriteLine("  add <path to file or folder>       Add a file or folder to the list");
+        Console.WriteLine("  delete <path to file or folder OR file ID>         Deletes a file or folder from the list");
+        Console.WriteLine("  deleteall        Deletes all items in the list");
+        Console.WriteLine("  list             Lists all items in the list");
+        Console.WriteLine("  help             Shows this help message");
+    }
+}