[RFC] Accessing CLI Arguments

[mertyildiran]

Implement the args core library and provide the necessary C extension API in the language's source to access command-line arguments from Chaos C extensions.

For a command like this:

chaos dev.kaos arg1 arg2 -s 'short value' --long 'long value'

the library provide these functionality:

import args

print args.count() # Should print 7
print args.index(0) # Should print 'dev.kaos'
print args.index(1) # Should print 'arg1'
print args.index(2) # Should print 'arg2'
print args.index(3) # Should print '-s'
print args.index(4) # Should print 'short value'
print args.index(5) # Should print '--long'
print args.index(6) # Should print 'long value'

print args.file() # Should print 'dev.kaos'
print args.short('s') # Should print 'short value'
print args.long('long') # Should print 'long value'