Rename and rework Installation docs page

pyrogram/api/errors/__init__.py

@@ -16,5 +16,5 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.
 
-from .exceptions import *
 from .error import UnknownError
+from .exceptions import *

pyrogram/client/handlers/disconnect_handler.py

@@ -34,5 +34,6 @@ class DisconnectHandler(Handler):
             The Client itself. Useful, for example, when you want to change the proxy before a new connection
             is established.
     """
+
     def __init__(self, callback: callable):
         super().__init__(callback)

pyrogram/client/types/__init__.py

@@ -30,6 +30,7 @@ from .input_phone_contact import InputPhoneContact
 from .location import Location
 from .message import Message
 from .message_entity import MessageEntity
+from .messages import Messages
 from .photo_size import PhotoSize
 from .reply_markup import (
     ForceReply, InlineKeyboardButton, InlineKeyboardMarkup,
@@ -43,4 +44,3 @@ from .venue import Venue
 from .video import Video
 from .video_note import VideoNote
 from .voice import Voice
-from .messages import Messages