functional-language

Follow-up issue to ocaml/ocaml#10275 (comment), noting CompCert's manual.

coconut src dst --and src2 dst2 --and src3 dst3 --target x.y

should be equivalent to

coconut src dst --target x.y
coconut src2 dst2 --target x.y
coconut src3 dst3 --target x.y

and also enable --jobs to do all the compilation simultaneously.

Features

• Code folding: This should be pretty easy - just walk over any "large" definitions and offer to fold them to a single line.
• Type at cursor/Type tooltip.
• Completion
• Document highlight: This should just be composed of "find this symbol" and then "walk the entire resolved tree".
• Go to definition: The nicest approach to this mi

Add functions for string mainuplation in the builtins and in the standard library.
Here a non exhaustive list:

• strlen
• @
• substr
• strcat
• split
• replace
  Of course do not forget to add documentation for every function.