all user-settings should be manageable within config.json

### Your use case

In my opinion the most options (especially: sendReadReceipts) in user settings should be preset in config.json.

The values should be:
* `force_true`: can't be disabled by user
* *true`: user can disable this option, this setting is enabled by default
* `false`: user can enable this option, this setting is disabled by default
* `force_false`: can't be enabled by user

### Have you considered any alternatives?

To leave the existing boolean logic untouched, the force settings (`settingForceDefaults`) can be separated:

fe:
```json
{
"settingDefaults": {
"breadcrumbs": true,
"UIFeature.urlPreviews": false
},
"settingForceDefaults": {
"UIFeature.feedback": false
}
}
```

### Additional context

_No response_