Integrate study and scheduler into mhc app

[eldcn]

♻️ Current situation & Problem

• Wires the study bundle and scheduler into the app for the first time, and builds the Home tab on top of them.
• MHCStudyBundleProvider loads the bundle from assets on configure and hands it to the study manager on every launch, so an enrollment carries forward when the bundle describes a newer study revision.
• StudyEnroller enrolls once at the final onboarding step, reusing the account's dateOfEnrollment when present so schedules survive a reinstall.
• Consent now resolves from the bundle for the device locale, falling back to the bundled en-US asset — hence ConsentConfigurationBuilder.document becoming suspending.
• The Home tab renders today's tasks, missed tasks, nudges and always-available tasks from scheduler events through the :ui-scheduler components.
• Only the article action is handled so far: an informational task opens its markdown in a bottom sheet and completes on presentation. Questionnaires, timed walk/run tests and ECG raise their intent but do nothing yet; the missed-tasks list, prompted actions and nudge sources follow in separate PRs.
• Integrate gradle task to fetch the released study bundle artifact and store it app assets

⚙️ Release Notes

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Include code snippets that provide examples of the feature implemented or links to the documentation if it adds to or changes the public interface.

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✅ Testing

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[codecov]

Codecov Report

❌ Patch coverage is 58.82353% with 7 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...i/scheduler/SchedulerNotificationsConfiguration.kt	0.00%	7 Missing ⚠️

📢 Thoughts on this report? Let us know!

[PSchmiedmayer]

Thank you for the work here @eldcn; would let @pauljohanneskraft some insights but happy to merge for now as we go through changes step by step.