Process class

1. Constructors
2. Process
3. Properties
4. exitCode
5. pid
6. stderr
7. stdin
8. stdout
9. hashCode
10. runtimeType
11. Methods
12. kill
13. noSuchMethod
14. toString
15. Operators
16. operator ==
17. Static methods
18. killPid
19. run
20. runSync
21. start