A refactor

[sansyrox]

Current Behavior

The last two issues show that there is a need to refactor some code in Robyn.

And these are the things that I want to focus on:

• Fix Create Custom headers for the response. #174 and Add an ability to notify websockets through other websockets/functions. #175
• See to this Build failure #166
• See if there is a need to make sub modules in Python
• Add some types definitions through mypy (still not very happy about this one, so may or may not do this).
• Code split rust code and fix some typos in the functions
• Get rid of the hashmap clones that you are doing in the code
• Get rid of unwraps and write more idiomatic code
• Write more black box tests
• Improve the testing suite quality, i.e. remove the need to kill and start the server all the time through an external dependency.

[sansyrox]

All done here!