Convert runtime generated files to AST

[Korbeil]

The idea is to take all files in src/**/Generator/Runtime/data and convert them as AST in order to remove theses files after.

To make this you can use the AST builder from php-parser: https://github.com/nikic/PHP-Parser/blob/master/doc/component/AST_builders.markdown (you can read more about php-parser on the repo README).