feat(network): add network retry system with fallback & system setup fixes

[itsvlxd]

Release Summary

This PR introduces a robust network retry system with fallback logic, resolves missing environment variable issues during network setup, cleans up first-boot system initialization, and updates ISO nightly build CI tagging.

Key Changes

Features

• Network: Added a network retry system with automatic fallback mechanism to handle dropped or unstable connections.

Fixes & System Improvements

• Setup: Fixed missing RETRO_DIR environment variable in network setup script.
• System Boot: Removed audio and fan setup tasks from the first-boot sequence and improved faillock reset handling.

Maintenance & CI

• CI/CD: Migrated ISO nightly build tags to prevent failures caused by a GitHub server-side issue.
• Settings & Dependencies: Reordered Python package installation order and updated nightly build docstrings to reference the new tag name.

Testing & Verification

• Verified network retry behavior and fallback execution on network failure.
• Confirmed RETRO_DIR resolves correctly during setup.
• Tested first-boot sequence without audio/fan execution.
• Verified CI ISO build pipeline triggers on updated nightly tags.

[itsvlxd]

🎉 This PR is included in version 1.3.0 🎉

The release is available on GitHub release

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