refactor: centralize common strings, paths, and default values into a new Constants class.

Configuration/ConfigManager.cs

@@ -1,6 +1,7 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
+using Toak.Core;
 using Toak.Serialization;
 using Toak.Core.Interfaces;
 
@@ -8,12 +9,11 @@ namespace Toak.Configuration;
 
 public class ConfigManager : IConfigProvider
 {
-    private readonly string ConfigDir = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".config", "toak");
-    private readonly string ConfigPath;
+    private readonly string ConfigDir = Constants.Paths.ConfigDir;
+    private readonly string ConfigPath = Constants.Paths.ConfigFile;
 
     public ConfigManager()
     {
-        ConfigPath = Path.Combine(ConfigDir, "config.json");
     }
 
     public ToakConfig LoadConfig()