Added notification pop up

[Aayush-hub]

Issue Number

ISSUE: #88 Add Notification pop-up system when 'No Mask' detected.

Describe the changes you've made

Added notification bar on desktop for admin, when no mask is detected in frame.

Checklist

• [x] My code follows the code style of this project.
• [x] I have performed a self-review of my own code.
• [x] My changes generate no new warnings.
• [x] The title of my pull request is a short description of the requested changes.

Notification Screenshot

Working Screenshots

With mask	Without Mask

[Aayush-hub]

@chandrikadeb7 Mam, please review my PR. #SWOC

[chandrikadeb7]

@chandrikadeb7 Mam, please review my PR. #SWOC

Please attach a demo video/image. I'm not able to run your files.

[Aayush-hub]

@chandrikadeb7 Mam, please review my PR. #SWOC

Please attach a demo video/image. I'm not able to run your files.

@chandrikadeb7 Mam, I have updated the PR with working screenshots.