Migrate to Next App Router (#449)
* chore(toolkit): migrate to app router
* chore(toolkit): add auth
* chore(toolkit): add chat routes
* chore(toolkit): rename router
* chore(toolkit): add use client to all components
* chore(toolkit): fix bugs in migration
* fix format
* Update DiscoverAgents.tsx
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Co-authored-by: misspia-cohere <140425731+misspia-cohere@users.noreply.github.com>
