Add Post Types and Taxonomies

Add Post Types and Taxonomies

- [x] wp-parser-function
- [x] wp-parser-class
- [x] wp-parser-hook
- [x] wp-parser-method

Taxonomies:

- [x] wp-parser-source-file
- [x] wp-parser-package
- [x] wp-parser-since
- [x] wp-parser-namespace
- [x] wp-parser-project