Remove `CoreSettingsFragment` from project, and use pure composable instead.

[MohitMaliFtechiz]

Parent Issue #4572

Remove CoreSettingsFragment from the project (and related subfragments), and use pure composable functions instead.

After converting this, rememberSaveable will work properly see #4587 (comment) for more details. That we will use for showing the dialog in SettingScreen.

[atharvyadav22]

@MohitMaliFtechiz
Can i work on it? or should i complete my PR after all the Issues releated to corresponding issues are solved on #4587 (comment)

[MohitMaliFtechiz]

@atharvyadav22, I have started working on this issue and prepared some code. Currently, i am working on stabilizing the CI. Once the created tickets are implmented, you can start with your PR. In the meantime, you can test scenarios where we are using the remember and if you find something that needs to be changed. Create a ticket for that.