Mariano/updated employees (#1430)

* chore: update Header component and enhance NoAccess page layout

- Added Header component to NoAccess page for better organization context.
- Adjusted layout of NoAccess page to improve user experience and visual structure.
- Updated Header component to conditionally render AssistantButton based on hideChat prop.

Dependencies updated in bun.lock for @dub/embed-react, dub, and @tiptap/extension-highlight.

* feat: implement training video backfill functionality

- Added scripts and server actions to trigger training video completion backfill for all organizations or specific organizations.
- Created jobs to handle backfilling of training video records for existing members in organizations.
- Enhanced employee onboarding processes by ensuring new members have training video completion entries created upon invitation or organization creation.
- Updated README with usage instructions and details on the backfill jobs.

This implementation improves the tracking of training video completions for all members, ensuring accurate data representation in the system.

* fix: update database access in training video backfill action

- Replaced direct database access reference with a centralized db import for improved consistency and maintainability in the triggerTrainingVideoBackfill action.

* chore: remove backfill training videos script

- Deleted the backfill-training-videos.ts script as it is no longer needed for triggering training video completion backfill jobs. This change simplifies the codebase and removes redundant functionality.

* chore: remove training video backfill action and documentation

- Deleted the trigger-training-video-backfill action and its associated README documentation as they are no longer needed. This change streamlines the codebase and eliminates outdated references to backfill functionality.

Author: Marfuen