Add command: Spacing is taken into account for name

[skyl3-r]

Steps to reproduce:

1. add n/company 1 p/999 a/there cp/link e/hello@mail r/
2. add n/company               1 p/999 a/there cp/link e/hello@mail r/

Expected: Should not allow second company to be created as multiple spaces should be ignored
Actual: Second company is created
Justification: In real life it is highly unlikely for a company to intentionally have multiple spaces in their name, thus multiple spaces should be considered a user error and taken into account (by removing multiple spaces and replacing with a single space)