Cast level argument of console_log action always to string

[marcoroth]

This pull request fixes a bug where passing the level argument to the console_log action as a Symbol it would unnecessarily escape the value of the Symbol.

So a call like:

turbo_stream.console_log("Message", :error)

Would end up in:

<turbo-stream message="Message" level="&quot;error&quot;" action="console_log"></turbo-stream>

With this pull request the <turbo-stream> gets correctly generated as:

<turbo-stream message="Message" level="error" action="console_log"></turbo-stream>

This pull request also enhances the console_log action to be provided via kwargs instead of just regular positional arguments. Additionally, this is now also valid:

turbo_stream.console_log(message: "Message")
turbo_stream.console_log("Message", level: :log)
turbo_stream.console_log(message: "Message", level: :log)
turbo_stream.console_log(level: :log, message: "Message")