Feature/saajan persona (#3)

* feat: add template based email content (html + plaintext fallback)

* feat: init saajan component

* feat: add aesthetic noise background and implement Saajan component in register and login

* feat: add post seal modal for vault

* refactor: add proper props interfaces

* refactor: expose props on ui components

* feat: add ssajan in lots of flows

* fix: remove render test with no value and add aria helper for btn identification

* refactor: update email notification to account for proper arguments

* refactor:  refactor E2E auth helper and mail parsing logic

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Co-authored-by: ramvignesh-b <ramvignesh-b@github.com>

backend/templates/email/vault_unlock.html

@@ -0,0 +1,20 @@
+{% extends 'email/base.html' %}
+
+{% block content %}
+    <p>
+        Time has a way of making things clearer.<br/>
+        Or heavier. Sometimes both.
+    </p>
+    <p>
+        You had something to say at this exact moment.<br/>
+        I kept it exactly as you left it. <br/>
+        Not a word changed. Not a word read.
+    </p>
+{% endblock %}
+
+{% block footnote %}
+    <p>
+        You're ready now. Or maybe you're still not.<br/>
+        Open it anyway. You won't regret it.
+    </p>
+{% endblock %}