Picows

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* Added optional automatic replies to incoming PING messages, enabled by default
* Added auto_ping_strategy argument to ws_connect/ws_create_server that controls when pings are sent
* Added new topic guides to the documentation

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* Added WSTransport.measure_roundtrip_time method + example

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* Log disconnect due to no PONG reply on INFO level
* Make WSFrame string representation more descriptive
* Fix minor mistakes in documentation

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* Added optional automatic ping-pong mechanism to detect broken connection
* Added an option to WSTransport.disconnect to disconnect immediately without flushing send buffers
* Re-structured documentation, added 'Topic guides' section

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* Change WSUpgradeRequest.headers type from Dict to CIMultiDict
* Fix: ws_connect is ignoring URI query parameters
* Fix: WSUpgradeRequest.version field is always None

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* Fix: picows wasn't working on windows with asyncio and python<=3.10 because data_received callback gets bytearray object instead of bytes.
* Fix: ws_connect was throwing TimeoutError on handshake timeouts, changed to asyncio.TimeoutError just to be consistent with the rest asyncio behaviour