Add dunder methods to all classes necessary

[VigneshVSV]

As the package is in early development, issues like context management (enter, exit), hashing (hash), representation (str) etc. are not found in many classes in the package. This has to be added to use the package in a general sense with all other python packages.

Possible steps

• Survey all classes found (especially the important ones like Thing, EventLoop, ObjectProxy) and find which dunder methods are not found
• Come up with use cases what dunder methods need to be supported
• Implement them