docs: add keywords and descriptions

docs/extensions/flask.rst

@@ -1,3 +1,7 @@
+.. meta::
+   :description: Send email in Flask. 
+   :keywords: send, email, Python, Flask
+
 .. _ext-flask:
 
 Flask Extension

docs/extensions/logging.rst

@@ -1,3 +1,7 @@
+.. meta::
+   :description: Email logger for Python. 
+   :keywords: send, email, Python, logging
+
 .. _ext-logging:
 
 Email Logging

docs/tutorials/attachments.rst

@@ -1,4 +1,8 @@
 
+.. meta::
+   :description: Send email with attachment in Python.
+   :keywords: send, email, Python, attachment
+
 .. _attachments:
 
 Sending Email with Attachments

docs/tutorials/getting_started.rst

@@ -1,3 +1,7 @@
+.. meta::
+   :description: Send email in Python. 
+   :keywords: send, email, Python
+
 .. _getting-started:
 
 Getting started

docs/tutorials/jinja_support.rst

@@ -1,3 +1,6 @@
+.. meta::
+   :description: Send email in Python using Jinja. 
+   :keywords: send, email, Python, jinja
 
 .. _jinja-support:
 

docs/tutorials/sending.rst

@@ -1,3 +1,7 @@
+.. meta::
+   :description: Send email in Python.
+   :keywords: send, email, Python
+
 .. _sending-emails:
 
 Sending Emails