[pipes-functions] Adding new functions for pipes

[pratikmota]

Changes:

1. Adding new pipe function
2. Adding wait function
3. Adding append-to-file function
4. Adding stdin function

Testing:

• append-to-file
  existing file
  
  

  file does not exist then automatically new file is created
  
  

• new and wait pipes
  

• how to check stdin ( I assume that it will take user input , but if i use with out it is taking input but getting stuck) (Stdin creates a pipe that reads from os.Stdin.)
  May be i am missing correct use/test of it.
  

[refaktor]

Thank you!

cc pipes is a separate command that you call to move to pipes subcontext. Then you don't need do\in do\par or cc .. you just call functions directly like x> echo "Hello" |append-to-file "file.txt".

It would be an improvement if you could you make function that accept file accept rye-file instead of string? echo "Hello" |append-to-file %file.txt

you can test stdin if you create a rye script test.rye where for example do\par pipes { stdin |out } and then call it for example cat somefile.txt |rye test.rye