add more useful message when no releases found

[gdams]

Description of change

add more useful message when no releases found and improve the animated placeholder while the releases are loading

Checklist

• npm test passes
• documentation is changed or added (if applicable)
• permission has been obtained to add new logo (if applicable)
• contribution guidelines followed here

[netlify]

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[codecov]

Codecov Report

Attention: Patch coverage is 54.68354% with 179 lines in your changes missing coverage. Please review.

Project coverage is 80.87%. Comparing base (7caa5ff) to head (919ef13).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...rc/components/Marketplace/AllReleaseCard/index.tsx	38.64%	154 Missing ⚠️
src/components/Marketplace/DownloadTable/index.tsx	21.05%	15 Missing ⚠️
src/components/Temurin/Tabs/index.tsx	33.33%	6 Missing ⚠️
src/components/ChecksumModal/index.tsx	93.54%	2 Missing ⚠️
src/components/Common/SelectorHeader/index.tsx	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1192      +/-   ##
==========================================
- Coverage   81.66%   80.87%   -0.79%     
==========================================
  Files         156      156              
  Lines       11992    12319     +327     
  Branches      933      952      +19     
==========================================
+ Hits         9793     9963     +170     
- Misses       2199     2356     +157     

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