feat(geodb): add GeoDB Management

[olalie]

Summary

Add GeoDB Management and improve GeoIP database handling, documentation, and user workflows.

This PR introduces provider-aware GeoIP database management with support for MaxMind GeoLite2 and DB-IP Lite, improves startup and runtime handling, and refreshes user documentation throughout the project.

Changes

GeoDB Management

• add GeoDB Management window
• support MaxMind GeoLite2 installation and updates
• support DB-IP Lite installation and updates
• detect installed provider and database status
• show database version and freshness information
• reload GeoIP databases without restarting TapMap

GeoIP handling

• add dedicated GeoDB service layer
• add provider-specific MaxMind and DB-IP integrations
• improve startup handling when databases are missing
• persist MaxMind credentials securely using system keyring

UI

• add provider selection and installation workflow
• add status cards and operation feedback
• add loading indicators for long-running operations
• add direct access to the GeoDB data directory
• improve About view with provider and database information

Daily Activity Report

• refine narrative wording and report tone
• improve alignment between report text and visualizations
• simplify provider concentration summaries

Documentation

• reorganize MkDocs documentation structure
• add GeoIP Database Management guide
• add Docker guide
• add Environment Variables guide
• refresh README, Help, and About documentation
• update screenshots and user documentation

Testing

• pytest
• GeoDB regression tests
• manual testing of GeoDB installation and update workflows
• manual verification of Help, About, README, and MkDocs documentation