[a11y] Add semantic labels

[iqfareez]

From Google Play Pre Lauch Report details:

Adding semantic labels for button element etc. is a good idea. Will implement inshallah.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[iqfareez]

Sabajap

[iqfareez]

Useful resources:

• https://docs.flutter.dev/ui/accessibility-and-internationalization/accessibility
• https://docs.flutter.dev/ui/widgets/accessibility
• -etc

[iqfareez]

Here is the report from the app Accessibility Scanner:

https://docs.google.com/document/d/1NNpBR98NZW91BN8_ECVfSOtLPMG2L0JalYQMFvNEaTc/edit?usp=sharing