[ICON REQUEST]: SQL

### I have searched through the issues and didn't find my problem.

- [x] Confirm

### About the icon

Currently there is no icon for SQL, although there are but they are DBMS (mysql, postgresql, etc.). So I think it's better to have one for SQL only.

### Links and sources

There is no official logo for the language.

Wikipedia link: https://en.wikipedia.org/wiki/SQL
Learn SQL: https://www.w3schools.com/sql/

### Icon links and previews

#### sql-original

https://github.com/user-attachments/assets/f20b790e-7632-462e-b3db-00d209a26ccb

[google drive link to icon](https://drive.google.com/drive/folders/1sX-Hu7_7v_DybnoQFdEff2C9o6qYeKbv?usp=sharing)

### Additional information

None

Start by reviewing the repository's existing DBMS icons and compare them with the supplied SQL preview and source links. Add an SQL icon following the project's established icon variants and verify that the new icon appears consistently with the existing collection.

Written by the indexing model from the issue text.