[FEATURE]: Add Rating System for Definitions

### 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.

No

### Proposed Solution

This pull request introduces a new feature that allows users to rate definitions on a scale of 1 to 5 stars. This enhancement aims to improve user engagement and ensure the accuracy and quality of the content on jargons.dev.

### Screenshots

_No response_

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

Yes

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

Ratings are stored in the database, associated with each definition, allowing for easy retrieval and display.
The system calculates and displays the average rating for each definition, providing valuable feedback to users.

No files, tests, or entry points are identified. Start by locating how definitions are stored and displayed, then determine where rating data and averages would fit. Done means users can submit 1–5-star ratings and see an average for each definition, with coverage for the new behavior.

Written by the indexing model from the issue text.