docs: migrate the Spinners to Hugo

[vrishtrix]

Description

This PR moves the spinners documentation from the current documentation page to Hugo. It looks similar to the alert example that can be found here

Fixes #291 and has no breaking changes.

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change contains documentation update

Breaking changes

N/A

How Has This Been Tested?

N/A

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have been merged and published in downstream modules
• [x] I have checked my code and corrected any misspellings

[codecov[bot]]

Codecov Report

Base: 98.61% // Head: 98.61% // No change to project coverage :thumbsup:

Coverage data is based on head (86183aa) compared to base (681536e). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #368   +/-   ##
=======================================
  Coverage   98.61%   98.61%           
=======================================
  Files          89       89           
  Lines        4116     4116           
  Branches      375      375           
=======================================
  Hits         4059     4059           
  Misses         57       57           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.