Move to Poetry for deps and packaging

setup.py has been removed, and Poetry is now used to package for
install. This fixed an issue i had with uploading to PyPI, so one can
now run 'pip install jellyfin-accounts' to install.

jellyfin_accounts/data/email.mjml

@@ -0,0 +1,34 @@
+<mjml>
+    <mj-head>
+        <mj-font name="Noto Sans" href="https://fonts.googleapis.com/css2?family=Noto+Sans:wght@400;700&display=swap" />
+    </mj-head>
+    <mj-body>
+        <mj-section background-color="#f0f0f0">
+            <mj-column>
+                <mj-text font-style="bold" font-size="20px">
+                    Jellyfin
+                </mj-text>
+            </mj-column>
+        </mj-section>
+        <mj-section>
+            <mj-column>
+                <mj-text font-size="15px" font-family="Noto Sans, Helvetica, Arial, sans-serif">
+                    <p>Hi {{ username }},</p>
+                    <p>    Someone has recently requested a password reset on Jellyfin.</p>
+                    <p>If this was you, enter the below pin into the prompt.</p>
+                    <p>The code will expire on {{ expiry_date }}, at {{ expiry_time }}, which is in {{ expires_in }}.</p>
+                    <p>If this wasn't you, please ignore this email.</p>
+                </mj-text>
+                <mj-button>{{ pin }}</mj-button>
+            </mj-column>
+        </mj-section>
+        <mj-section background-color="#f0f0f0">
+            <mj-column>
+                <mj-text font-style="italic" font-size="10px">
+                    {{ message }}
+                </mj-text>
+            </mj-column>
+        </mj-section>
+    </body>
+</mjml>
+