Update parsetree

[tdelvecchio-jsc]

Only updates the standard parser and normalization logic; does not actually fix styling of the new syntax. In particular, this updates through:

• Removal of jane_syntax, adding more syntax to the parsetree directly rather than encoding in attributes
  • kind annotations on types
  • layout annotations on type parameters
  • labelled tuples
  • comprehensions
  • strengthening
  • currying
  • unboxed numbers
  • unboxed tuples
• Addition of signature modalities
• Addition of function return mode annotations
• Addition of directives
• Addition of pexp_hole
• Addition of functor modes

The first commit changes the repatch scripts to

1. account for some changes to the compiler, including changes to directory structure and files
2. improve the repatching code to give better merge conflicts than just ".rej" files

The second commit runs the repatch script and accepts the result directly. The third commit fixes the conflicts and resulting build errors from the changes.

Later PRs will add support for styling some of the new features.

Tested on internal code; successfully builds with no diff.

[dvulakh]

Looks good to me, thanks for seeing this change to completion.