Group AnkiQuest settings into clear sections

[AldanaBRZ]

Purpose / Description

AnkiQuest put more than twenty controls in one long settings list, making streak protection, notification delivery, and account options hard to find. The entry page now shows the leaderboard and five short sections: Account & connection, Study & streaks, Reminders & alerts, Friends & sharing, and App & data.

Approach

Move each existing control into one section while preserving its preference key, default, and behavior. Split notification options into event and delivery groups. Add section labels in the app's English, Spanish, German, French, and Portuguese resources.

How Has This Been Tested?

• Focused Android Robolectric tests for settings navigation, control coverage, and notification health: 8 passed.
• :AnkiDroid:ktlintCheck passed.
• XML resources parsed and the old and new control keys compared: all 22 are retained exactly once.

[github-actions]

Snapshot diff report vs ankiquest. Open screenshot-diff for diffs.

• PreferencesScreenshotTest: 6 changes

All 6 changed screenshots

PreferencesScreenshotTest

• AnkiquestAccountSettingsFragment_compare.png
• AnkiquestMaintenanceSettingsFragment_compare.png
• AnkiquestNotificationsSettingsFragment_compare.png
• AnkiquestSettingsFragment_compare.png
• AnkiquestSharingSettingsFragment_compare.png
• AnkiquestStudySettingsFragment_compare.png