Pywa

- [client] fix document filename

- [client] allow to modify token and remove handlers/callbacks
- [tests] test client methods

- [client,message_status] Added param `tracker` to all send-message-methods in order to track the message status, allowing to pass `CallbackData` subclasses to`tracker` param
- [client,api] adding `update_conversational_automation` and `get_business_phone_number` to add and get `commands`, `ice_breakers` and enable `ChatOpened` events
- [filters] adding `send_to_me` filters shortcut and `replays_to` filters. mark as deprecated all match-specific-type filters and create generic `matches`, `regex` filters for all text containing updates
- [flows] adding `updated_at` to `FlowDetails`
- [message] fix `from_user` in system messages
- [errors] adding optionals `error_subcode` and `type` to all errors
- [logging] improve loggers performance
- [utils] bump graph api version to 19.0 and expose `Version` in the package level
- [docs] switch readme to markdown

- [client] fix sending single contact
- [filters] prioritize `/` over `!` in `filters.command(...)` and `filters.is_command`

- [chat_opened] adding a new type: `ChatOpened`
- [server] improve handlers and logs
- [types] warning on missing enum constant
- [flows] handle cases where there is no `flow_token` in `FlowCompletion` (When the flow completion sent from iOS)
- [tests] adding more tests

- [client] Added `register_phone_number` method
- [client] mark the `body` arg in send image/video/doc as deprecated. use `caption` instead
- [utils] bump `FLOW_JSON` version to 3.1
- [flows] allow `DataSource` in `FlowResponse` data
- [flows] `Image` .src can be dynamic
- [flows] default `ActionNext` to SCREEN
- [flows] adding `.success` for screen and adding in-docs examples