clean up top-level directories

[0xCryptoSheik]

Hey @staccDOTsol,

At the moment, this repository contains 4 top-level directories:

• curl-demo
• mango-bowl
• mango-service-v3
• opportunities-assessor
• py

Few observations:

• All top-level directories that aren't strictly necessary should be removed (curl-demo ?).
• the py directory I assume contains the main project source code, it should have a more explicit name like src
• mango-bowl, mango-service-v3 & opportunities-assessor I assume are 3rd party dependencies.
  • 3rd party dependencies should not be present in this repository but instead be retrieved from their respective repositories or package managers.
  • if removing 3rd party dependencies from this repository is too troublesome, they should at least be documented as such in the README.
  • it appears opportunities-assessor is in fact "Mango v3 Client Library", then it should be at least named mango-v3-client-library or similar for clarity.