Add the ability to read from standard input

[kniazkov]

When launching an application as part of the "translator" - "Polystat" - "IDE visualizer" chain, we have to create a temporary file containing the source code of the program in the EOLANG language. It is not comfortable. It is required to add an option that would read the source code from the standard system input. This will allow us to run the application in scripts like this:

cat source_file | translator | java -jar polystat.jar --sarif --option2 --optionN | ....