feat: add support for description in radio button

[arjunlalb]

Description

add support for description in radio button

Testing

Manually verified. UTs added.

Checklist:

• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Merging #946 (44f117c) into main (6cca58d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #946   +/-   ##
=======================================
  Coverage   85.05%   85.05%           
=======================================
  Files         812      812           
  Lines       16723    16723           
  Branches     2004     2004           
=======================================
  Hits        14223    14223           
  Misses       2468     2468           
  Partials       32       32           

Impacted Files	Coverage Δ
...ects/components/src/radio/radio-group.component.ts	100.00% <ø> (ø)

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[github-actions]

Unit Test Results

    4 files  ±0  259 suites  ±0   14m 45s ⏱️ +3s
937 tests +1  937 ✔️ +1  0 💤 ±0  0 ❌ ±0 
943 runs  +1  943 ✔️ +1  0 💤 ±0  0 ❌ ±0 

Results for commit 3c36e74. ± Comparison against base commit 6cca58d.