feat: extend email support for SSL/No Auth Email Support (#1235)

* Changes Settings to use new SMTP_AUTH_STRATEGY variable in place of SMTP_TLS with transition support

#1187

* Wires up default email client to use ssl or tls authentication if enabled in settings

* Updates the docs

* Update template file

* remove SMTP_TLS and use staticmethod for validate

* consolidate test cases with params

Co-authored-by: Hayden <64056131+hay-kot@users.noreply.github.com>

docker-compose.yml

@@ -63,13 +63,14 @@ services:
 
       # =====================================
       # Email Configuration
-      # - SMTP_HOST=
-      # - SMTP_PORT=587
-      # - SMTP_FROM_NAME=Mealie
-      # - SMTP_TLS=true
-      # - SMTP_FROM_EMAIL=
-      # - SMTP_USER=
-      # - SMTP_PASSWORD=
+      # SMTP_HOST=
+      # SMTP_PORT=587
+      # SMTP_FROM_NAME=Mealie
+      # SMTP_AUTH_STRATEGY=TLS # Options: 'TLS', 'SSL', 'NONE'
+      # SMTP_FROM_EMAIL=
+      # SMTP_USER=
+      # SMTP_PASSWORD=
+
   # postgres:
   #   container_name: postgres
   #   image: postgres