[FEATURE]: Add YouTube Video Suggestions for Each Searched Term

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### Is this a unique feature/idea?

- [x] I have checked "open" AND "closed" issues and this is not a duplicate

### Is your feature request related to a problem/unavailable functionality? Please describe.

This pull request introduces a new feature that enhances the learning experience for users by automatically suggesting YouTube videos related to the searched jargon term.

When a user searches for a word and its explanation is displayed, the system now fetches a few relevant YouTube videos (either short explainers or full-length tutorials) that help users better understand the concept in a visual and interactive way)

### Proposed Solution

After a user searches for a word, a short list of related YouTube videos will appear under the explanation.

I will create a new component called YouTubeSuggestions, which uses the YouTube Data API to search for videos matching the searched term.

The API key will be added in the .env file as YOUTUBE_API_KEY.

Finally, I will use Tailwind CSS to give the video section a simple and clean design.

### Screenshots

_No response_

### Do you want to work on this issue?

No

### If "yes" to above, please explain how you would technically implement this

_No response_

Inizia individuando il componente YouTubeSuggestions previsto e la configurazione .env, quindi traccia dove vengono visualizzati i termini cercati e le spiegazioni. Esamina l’integrazione di YouTube Data API e le convenzioni di Tailwind CSS prima di implementare l’elenco dei video. Il lavoro è completato quando sotto ogni spiegazione compaiono video pertinenti e YOUTUBE_API_KEY viene letta dall’ambiente.

Scritto dal modello di indicizzazione a partire dal testo della issue.