feat: add snjs package

packages/snjs/lib/Services/Session/Sessions/JwtSession.ts

@@ -0,0 +1,20 @@
+import { Session } from './Session'
+
+/** Legacy, for protocol versions <= 003 */
+
+export class JwtSession extends Session {
+  public jwt: string
+
+  constructor(jwt: string) {
+    super()
+    this.jwt = jwt
+  }
+
+  public get authorizationValue(): string {
+    return this.jwt
+  }
+
+  public canExpire(): false {
+    return false
+  }
+}