feat: IR emitter setup UX, man pages, and code cleanup

[Vladush]

Description

This PR overhauls the IR emitter setup and hardware backend selection logic. It introduces a better installation flow for the IR emitter, adds comprehensive system documentation via man pages, and cleans up the hardware provider configuration to remove unsupported CUDA and OpenVINO references (as the project's static OpenCV build does not support them).

Additionally, it refactors core service logic to comply with C++17 Core Guidelines, using std::string_view for optimal string handling and ensuring robust backend fallback iteration.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

How Has This Been Tested?

The changes were verified through local builds and regression testing across all supported architectures.

• Ran make test locally — confirmed a full authentication round-trip with the daemon.
• Confirmed linuxcampam show-config accurately reports the active hardware provider (OpenCL) and IR emitter status.

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
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes