Implement name and is done and due date

[DraxCodes]

Implemented the following features.

• [x] Add Implementation tests for Add/Remove/RemoveMany
  • Felt like they needed to be added now to make sure i don't break anything 😄
• [x] Todo Name
  • Todo name should be no longer than 40 chars.
  • If no todo name
    • If description fits within char limit then use it as a name & delete the description.
    • If it doesn't fit then truncate.
• [x] Todo IsComleted
• [x] Todo Completion Date

Tests with Postman

Listing Adding with date (formatted as a C# DateTime (might need to change this? not sure) fixes #2

[DraxCodes]

Thanks for the reviews guys, all should be resolved now. Let me know if you see anything else.