Detect signal connections made in tscn files
The plugin currently doesn't detect signal connections that are made in TSCN files and marks signal parameters as unused even though they actually are used. This would probably require a parser for the TSCN format.
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![image](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
![image](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)