docs: added FAQ section to documentation

docs/faqs.rst

@@ -0,0 +1,67 @@
+
+Frequently Asked Questions
+==========================
+
+Circular Import
+---------------
+
+**Question**
+
+I get this error:
+
+.. code-block:: console
+
+    Traceback (most recent call last):
+    File "..\email.py", line 1, in <module>
+        from redmail import EmailSender
+    File "..\redmail\__init__.py", line 1, in <module>
+        from .email.sender import EmailSender, send_email, gmail, outlook
+    File "..\redmail\email\__init__.py", line 1, in <module>
+        from redmail.email.sender import EmailSender
+    File "..\redmail\email\sender.py", line 3, in <module>
+        from email.message import EmailMessage
+    File "..\email.py", line 1, in <module>
+        from redmail import EmailSender
+    ImportError: cannot import name 'EmailSender' from partially initialized module 'redmail' (most likely due to a circular import) (..\redmail\__init__.py) 
+
+**Answer**
+
+This is due to your script is named as ´´email.py´´ and that happens 
+to be the same name as the email library from standard library.
+Please use another filename than *email.py*. 
+
+From in Text Body 
+-----------------
+
+**Question**
+
+In text body, a line starting with *From* gets turned to *>From*.
+For example, I have this code:
+
+.. code-block:: python
+
+    from redmail import EmailSender
+
+    email = EmailSender(...)
+
+    email.send(
+        subject="An example email",
+        sender="me@example.com",
+        receivers=['me@example.com'],
+        text="Hi!\nFrom what we discussed..."
+    )
+
+But email body looks like this:
+
+.. code-block:: console
+
+    Hi!
+    >From what we discussed...
+
+**Answer**
+
+Please use HTML body instead if this causes problems. This is a problem 
+in smtplib itself and there is nothing to do with it at the moment. 
+Line beginning with **From** is mangled to **>From** to avoid body 
+injection and there is no way to switch that off. See more details from
+`this Stackoverflow answer <https://stackoverflow.com/a/71518593/13696660>`_.

docs/index.rst

@@ -123,6 +123,7 @@ Some more practical examples:
    tutorials/index
    extensions/index
    references
+   faqs
    versions