Fix Accordion typo in docs navigation and route naming

[vishxrad]

Summary

The components docs currently use the misspelling Accordian in navigation ids, labels, and route paths, while the page content and component name are Accordion.

Current locations

• docs/app/components/config/navigation.ts
• docs/shared/design-system/config/navigation.ts
• docs/app/components/blocks/accordian/page.tsx
• docs/app/components/blocks/accordian/page.module.css

Suggested implementation

Rename user-facing text and internal ids from accordian/Accordian to accordion/Accordion. If route paths are changed, preserve compatibility for the old /components/blocks/accordian path with a redirect or equivalent fallback.

Acceptance criteria

• User-facing docs navigation says Accordion.
• New route/path naming is spelled accordion, or the existing route is intentionally preserved with corrected labels.
• Existing links to the old misspelled path do not break.