[Mailer] Add feature mailer:send-email

[gmorel]

Linked to symfony/symfony#39173

http://127.0.0.1:8080/mailer.html

[OskarStark]

Just some small changes, thank you for working on this feature!

[OskarStark]

Suggested change

	Checking your configuration
	Checking your Configuration

[OskarStark]

Suggested change

	If you have any doubt on your configuration. Or if want to make sure your mail supplier is still working.
	If you have any doubt on your configuration or if want to make sure your mail supplier is working properly,

[OskarStark]

Suggested change

	You can do this with the ``mailer:send-email`` command:
	you can do this by using the ``mailer:send-email`` command:

[OskarStark]

Suggested change

	.. versionadded:: 5.3
	The ``mailer:send-email`` command was introduced in Symfony 5.3.

[OskarStark]

Suggested change

	.. code-block:: terminal
	$ php bin/console mailer:send-email [email protected] [email protected] --subject=Test --body=body
	# No subject/body to send simple test mail
	$ php bin/console mailer:send-email [email protected] [email protected]
	The command can also send body from file using ``--body-source`` option:
	.. code-block:: terminal
	$ php bin/console mailer:send-email [email protected] [email protected] --body-source=file --body=/path/to/file
	.. code-block:: terminal
	// no subject or body needed to send a simple test mail
	$ php bin/console mailer:send-email [email protected] [email protected]
	// use a custom body and/or subject
	$ php bin/console mailer:send-email [email protected] [email protected] --subject=Test --body=body
	// use a file for the body
	$ php bin/console mailer:send-email [email protected] [email protected] --body-source=file --body=/path/to/file

[OskarStark]

The code PR was closed, feel free to reopen. Thanks