Added url strings for homepage and documentation

[GabrielePalazzo]

Closes #603.

Let me know if it is a reasonable solution or if you want to discard it.

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.
• Compatibility with Qibo modules (Please edit this section if the current pull request is not compatible with the following branches).
  • Qibo: master
  • Qibolab: main
  • Qibolab_platforms_qrc: main

[codecov]

Codecov Report

Merging #604 (e6b67b4) into main (15bb374) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #604   +/-   ##
=======================================
  Coverage   96.34%   96.34%           
=======================================
  Files          99       99           
  Lines        6733     6733           
=======================================
  Hits         6487     6487           
  Misses        246      246           

Flag	Coverage Δ
unittests	96.34% <ø> (ø)

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see 2 files with indirect coverage changes

[scarrazza]

Thanks, could you please also replace the description with " Qibo's quantum calibration, characterization and validation module."?

[GabrielePalazzo]

@scarrazza @andrea-pasquale please have a final look, since something weird happened with git (it reverted some previous commits). Now it should all be ok.

[andrea-pasquale]

The final version looks good to me. I've just relaunched the CI. Feel free to merge as soon as tests are passing.