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/Token.cs

@@ -0,0 +1,37 @@
+using Microsoft.AspNetCore.DataProtection;
+
+namespace Bit.Core.Tokens
+{
+    public class Token
+    {
+        private readonly string _token;
+
+        public Token(string token)
+        {
+            _token = token;
+        }
+
+        public Token WithPrefix(string prefix)
+        {
+            return new Token($"{prefix}{_token}");
+        }
+
+        public Token RemovePrefix(string expectedPrefix)
+        {
+            if (!_token.StartsWith(expectedPrefix))
+            {
+                throw new BadTokenException($"Expected prefix, {expectedPrefix}, was not present.");
+            }
+
+            return new Token(_token[expectedPrefix.Length..]);
+        }
+
+        public Token ProtectWith(IDataProtector dataProtector) =>
+            new(dataProtector.Protect(ToString()));
+
+        public Token UnprotectWith(IDataProtector dataProtector) =>
+            new(dataProtector.Unprotect(ToString()));
+
+        public override string ToString() => _token;
+    }
+}