Backend with Azure Storage example added

[sebagomez]

Changes/added features:

• Backend support on Azure Storage

The following short checklist should be used to make sure your PR is of good quality, and can be merged easily:

• [x] follows project conventions
• [x] follows project principles
• [x] ./run.sh works correctly for all new examples
• [x] CI checks pass
• [x] mergeable to main (no conflicts)
• [ ] resolved issues linked
• [ ] Milestone linked (if applicable)

Reviewers: @ianmiell @ttarczynski @sanyer @teszes @choilmto @rodrigorras