refactor: move AppList to features with slot props

[Ryukemeister]

What does this PR do?

Part 3 of 3 PRs to decouple Apps Components and eliminate circular dependencies between @calcom/atoms, @calcom/web, and @calcom/features. (See PR #28098 for Part 1 and PR #28099 for Part 2.)

This PR breaks the remaining dependency violations:

1. atoms → web: ConferencingAppsViewPlatformWrapper imported AppList from @calcom/web → now imports from @calcom/features
2. web → atoms: AppListCard.tsx imported useIsPlatform from @calcom/atoms → deleted; consumers now pass the correct variant directly
3. features → trpc: AppList imported RouterOutputs from @calcom/trpc → replaced with explicit types (ConnectedApps from app-store, DefaultConferencingApp from prisma/zod-utils)

Changes

• Moved AppList.tsx → packages/features/apps/components/AppList.tsx with explicit types replacing RouterOutputs and a new AppListCardComponent slot prop
• Moved AppListCardPlatformWrapper.tsx → packages/platform/atoms/connect/conferencing-apps/ (platform-specific code lives in atoms)
• Deleted apps/web/modules/apps/components/AppListCard.tsx (the dynamic switcher using useIsPlatform)
• Updated all consumers to import AppList from features and pass the right AppListCardComponent variant:
  • Web consumers pass AppListCardWebWrapper
  • Atoms consumers pass AppListCardPlatformWrapper

Note: This branch includes changes from PR #28099 (Part 2) which moved AppSetDefaultLinkDialog and inlined QueryCell. Once PR #28099 is merged first, this PR's diff will shrink accordingly.

Updates since last revision

• Fixed double-nested data type: changed data: { items: ConnectedApps } to data: ConnectedApps since ConnectedApps already has the shape { items: ... }. CI type checks now pass.

Mandatory Tasks (DO NOT REMOVE)

• I have self-reviewed the code (A decent size PR without self-review might be rejected).
• I have updated the developer docs in /docs if this PR makes changes that would require a documentation change. — N/A (internal refactor)
• I confirm automated tests are in place that prove my fix is effective or that my feature works. — N/A (pure refactor; existing tests cover behavior)

How should this be tested?

This is a pure refactor with no intended functional changes. Verify:

1. Conferencing apps page (web): Navigate to /apps/installed/conferencing — the installed apps list should render identically to before
2. Conferencing apps page (atoms/platform): The platform wrapper should render the same apps list with platform-specific logo URLs
3. Calendar settings: Navigate to settings → calendars — the connected calendar list should render with AppListCardWebWrapper
4. Set default link dialog: Setting a default conferencing app link should still work from the AppList dropdown
5. Type checks: yarn type-check:ci --force — passes ✅

Environment variables: None required
Test data: Any user with installed conferencing apps (Zoom, Google Meet, Office 365 Video)

Human Review Checklist

• Type compatibility (CRITICAL): Verify ConnectedApps from @calcom/app-store/_utils/getConnectedApps exactly matches the shape of RouterOutputs["viewer"]["apps"]["integrations"]. The tRPC router might add/transform fields that aren't in the raw return type.
• Type compatibility: Verify DefaultConferencingApp from @calcom/prisma/zod-utils exactly matches RouterOutputs["viewer"]["apps"]["getUsersDefaultConferencingApp"]
• Circular dependency check: Confirm no new circular dependencies introduced (features should not import from trpc/web/atoms)
• Slot prop usage: Verify AppListCardComponent prop is passed in all consumers of AppList
• Merge ordering: PR refactor: move useAppsData to features  #28098 (Part 1) and PR refactor: move AppSetDefaultLinkDialog to features  #28099 (Part 2) should be merged first to avoid conflicts

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Requested by: @Ryukemeister

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