Add APNS Settings to the Export/Import Settings lists and note that
exporting requires a configured APNS Key ID and Key and that importing
overwrites the existing APNS credentials.

* Document Nightscout database size info row and alarm

Add the DB Size info row to the Information Display table and the
Nightscout Database Size alarm to the Alarm Types reference, with a note
explaining the dbsize plugin requirement and the DBSIZE_MAX caveat.

* Clarify DB Size description in lf-setup.md

Updated the DB Size description to specify Megabytes (MB) instead of MiB for clarity.

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Co-authored-by: Marion Barker <[email protected]>

Note the search fields added to the alarms list and Add Alarm sheet in
the Alarms feature, and the Menu search that also spans the Settings
sub-screen rows and deep-links into them.

* Document the dismissable status banner

Describe the top banner that surfaces Nightscout, Dexcom Share, and
Bluetooth heartbeat problems, and how it clears and is dismissed.

* Update lf-features.md

Describe the opt-in Skip if BG is rising / Skip if BG is falling /
Skip while charging toggles on the Low, High, and Low Battery alarms.

Describe the per-row drill-in detail and the optional Yellow/Red color
thresholds, including the fixed concerning direction and the rows that
support coloring with their default thresholds.

* Document the first-run onboarding guide

Rewrite the Initial Configuration section to describe the step-based
onboarding wizard (welcome, overview, data source, connect, units,
alarm basics, recommended alarms, tabs, notifications, privacy, done)
and the deferred Notifications/Calendar/Bluetooth permissions, with
screenshots of the welcome, overview, data-source, and connect steps.

* Add camera to deferred permission

Corrected capitalization in 'Deferred permissions' section and clarified the Camera permission description.

* Update camera permission request description

Clarified the camera permission request explanation.

* Update camera permission request explanation

Clarified the context for requesting camera permission in the setup guide.

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Co-authored-by: Marion Barker <[email protected]>

…formatting (#54)

…artbeat (#56)

…ns (#57)

)

…59)