fix(docs): add missing Badge success examples

[singkia]

Summary

• add the missing success variant to the Badge docs overview snippet
• add a dedicated Success example to the Badge variants section
• regenerate Badge metadata and add a regression test covering docs + registry alignment

Testing

• pnpm --filter @cloudflare/kumo exec vitest run --project=unit tests/docs/badge-docs.test.ts

Notes

• local screenshot verified the Badge page now shows success in the overview snippet, variants section, and API reference
• broader typecheck/dev issues in this checkout are pre-existing (echarts dependency resolution and docs dev env setup)

[geoquant]

hey thank you, if you make changes to packages/kumo a changeset is required. please don't bypass the pre commit hooks

[singkia]

Added a patch changeset for the changes in this PR. Thanks for catching that.

[singkia]

Added a patch changeset for the @cloudflare/kumo changes in this PR. Thanks for catching that.

[geoquant]

ah i'm so sorry, someone got to this one: #239

closing since it's merged. again, sorry. and thank you for help!

[singkia]

Thanks for the update, and no worries at all. Glad the issue is fixed in #239. Appreciate the follow-up and thanks again for taking a look.