feat: added dark mode in gallery section

[Viveksati5143]

Related Issue

Closes #474

Description

Integrated dark mode to gallery section as well for the comfort of users!!

Screenshots

https://github.com/Eduhub-Community/Eduhub-Community.github.io/assets/100852245/1195e9a8-fea4-4f89-84b6-02157fd8c72d

Checklist

• [X] My code adheres to the established style guidelines of the project.
• [X] I have included comments in areas that may be difficult to understand.
• [X] My changes have not introduced any new warnings.
• [X] I have conducted a self-review of my code.

[Viveksati5143]

Please review & merge it @AshAman999 👋

[Viveksati5143]

@AshAman999 level 1?🙂

[AshAman999]

@AshAman999 level 1?🙂

TBH i am not sure , that's i guess should be determined by @SahityaRoy

[Viveksati5143]

@AshAman999 level 1?🙂

TBH i am not sure , that's i guess should be determined by @SahityaRoy

Bruh like i'm contributing to other projects so ik it should be level 2. He won't reply so you only please update it:-(

[Viveksati5143]

@AshAman999 As you are a mentor you have a right to do so!!

[AshAman999]

Did upgraded your level Happy Contributing 👨‍💻