Ps 1291/apply to from json pattern to state (#3425)

* Clean up dangling behaviorSubject

* Handle null in utils

* fix null check

* Await promises, even in async functions

* Add to/fromJSON methods to State and Accounts

This is needed since all storage in manifest v3 is key-value-pair-based
and session storage of most data is actually serialized into an
encrypted string.

* Simplify AccountKeys json parsing

* Fix account key (de)serialization

* Remove unused DecodedToken state

* Correct filename typo

* Simplify keys `toJSON` tests

* Explain AccountKeys `toJSON` return type

* Remove unnecessary `any`s

* Remove unique ArrayBuffer serialization

* Initialize items in MemoryStorageService

* Revert "Fix account key (de)serialization"

This reverts commit b1dffb5c2c, which was breaking serializations

* Move fromJSON to owning object

* Add DeepJsonify type

* Use Records for storage

* Add new Account Settings to serialized data

* Fix failing serialization tests

* Extract complex type conversion to helper methods

* Remove unnecessary decorator

* Return null from json deserializers

* Remove unnecessary decorators

* Remove obsolete test

* Use type-fest `Jsonify` formatting rules for external library

* Update jsonify comment

Co-authored-by: @eliykat

* Remove erroneous comment

* Fix unintended deep-jsonify changes

* Fix prettierignore

* Fix formatting of deep-jsonify.ts

Co-authored-by: Thomas Rittson <trittson@bitwarden.com>
Co-authored-by: Thomas Rittson <31796059+eliykat@users.noreply.github.com>

libs/common/src/models/domain/encryption-pair.spec.ts

@@ -0,0 +1,34 @@
+import { Utils } from "@bitwarden/common/misc/utils";
+
+import { EncryptionPair } from "./account";
+
+describe("EncryptionPair", () => {
+  describe("toJSON", () => {
+    it("should populate decryptedSerialized for buffer arrays", () => {
+      const pair = new EncryptionPair<string, ArrayBuffer>();
+      pair.decrypted = Utils.fromByteStringToArray("hello").buffer;
+      const json = pair.toJSON();
+      expect(json.decrypted).toEqual("hello");
+    });
+
+    it("should serialize encrypted and decrypted", () => {
+      const pair = new EncryptionPair<string, string>();
+      pair.encrypted = "hello";
+      pair.decrypted = "world";
+      const json = pair.toJSON();
+      expect(json.encrypted).toEqual("hello");
+      expect(json.decrypted).toEqual("world");
+    });
+  });
+
+  describe("fromJSON", () => {
+    it("should deserialize encrypted and decrypted", () => {
+      const pair = EncryptionPair.fromJSON({
+        encrypted: "hello",
+        decrypted: "world",
+      });
+      expect(pair.encrypted).toEqual("hello");
+      expect(pair.decrypted).toEqual("world");
+    });
+  });
+});