Feature/token service (#1785)

* Implement draft token service

* Add tokenizer and factory

* Handle expiring tokens through base class

* Allow direct token validity checks

* Add safe unprotect to tokenizer

* Add interface to tokenizer factory

* Use tokenizer

* Fix rebase

* Handle cleartext prefix in tokenizer base

* Use epoch milliseconds for expiration in tokens

* Use tokenizers

* Test tokens

* Linter fixes

* Add TokenizerFactory to DI services

* Test epoch milliseconds deserialization

* Use separate injectables for each token type

* Fix directory

* Add functional unprotect to token

* Fix namespace and correct object names

* Remove Tokenable interface

* Test remaining Tokens classes

* Dotnet format

* Fix sut provider errors with update

* Remove useless property

Co-authored-by: Hinton <oscar@oscarhinton.com>

src/Core/Tokens/Tokenable.cs

@@ -0,0 +1,20 @@
+using System.Text.Json;
+
+namespace Bit.Core.Tokens
+{
+    public abstract class Tokenable
+    {
+        public abstract bool Valid { get; }
+
+        public Token ToToken()
+        {
+            return new Token(JsonSerializer.Serialize(this, this.GetType()));
+        }
+
+        public static T FromToken<T>(string token) => FromToken<T>(new Token(token));
+        public static T FromToken<T>(Token token)
+        {
+            return JsonSerializer.Deserialize<T>(token.ToString());
+        }
+    }
+}