Feat/lawyer availability hearing conflict detection

[Nareshkumawat-star]

Description

Introduces lawyer availability tracking and real-time conflict detection during court hearing scheduling to mitigate scheduling conflicts and case delays in the Indian judicial workflow.

Type of Change

• New feature (non-breaking change which adds functionality)
• Documentation update

closes #1625

Key Changes Made

1. Lawyer Availability Management:
   • Lawyers can mark dates as unavailable with specific reasons (vacations, appearances in higher courts, personal leave).
   • API: POST /api/v1/lawyer/availability, GET /api/v1/lawyer/availability, DELETE /api/v1/lawyer/availability/{id}.
2. Judge Hearing Scheduler & Conflict Detection:
   • GET /api/v1/hearings/check-conflict validates proposed hearing dates against the assigned lawyer's marked availability.
   • When a judge selects an unavailable date, a non-blocking warning banner appears with judge override capability.
3. Automated Hearing Notifications:
   • Dispatches in-app notifications to litigants and lawyers when a hearing is set.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes

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