refactor(components): rename story files to use underscores

Shibin Dasrequested to merge
issue/kern_ux-3568571:1.0.x into 1.0.x

Rename story files to use underscores instead of hyphens for consistency:

  • input.with-error.story.yml -> input.with_error.story.yml
  • input.with-hint.story.yml -> input.with_hint.story.yml
  • textarea.with-hint.story.yml -> textarea.with_hint.story.yml

Merge request reports