[pipes-functions] Adding exit-status, concat, args and close functions

[pratikmota]

Changes:

1. Adding new 4 functions
2. exit-status, concat, args and close function

Testing:

• when close is successful it will return nil so nothing is display in error
• args i tried to check, I am bit confuse how to test it. As it will be used to take command line argument of main func.
• For concat i created local a.txt and b.txt for testing.

[refaktor]

@pratikmota U, great ... and thanks for exposing the doubts, questions.

In rye so far nothing should return nil ... if all is ok, it would make sense that it returns 0, if not a failure.

You can probably write a script and call it with additional args bin/rye script.rye to test the args function.

Good about concat. I haven't documented this yet, but instead of doing do\par pipes { } you can just call cc pipes (like cd - change directory) and then all code is in pipes context.