Add options '--strip' and '--normalize'

[mjambon]

This facilitates the comparison of two versions of the same grammar.

test plan:

$ make && make install
$ ocaml-tree-sitter to-js --normalize ~/tree-sitter-c-sharp/src/grammar.json

... and check that the JS output doesn't contain constructs that don't affect the types in CST.ml such as field(), alias(), prec(), etc.

I'm using this for the C# upgrade. There will be a PR in ocaml-tree-sitter-semgrep with an example.

Security

• Change has no security implications (otherwise, ping the security team)

[nmote]

Seems reasonable