feat: Expand Hardware Telemetry with iGPU Monitoring and Accurate Processor Models

[scardracs]

This PR expands the hardware monitoring page in rog-control-center to display exact model names for CPU, iGPU, and dGPU, adds support for monitoring the integrated GPU (iGPU) temperature and utilization, and addresses a layout stretching bug in the system page.

Key Features

1. iGPU Telemetry & Layout:
   • Adds real-time temperature and utilization monitoring for the integrated GPU (iGPU), conditioned on its presence (SystemPageData.has_igpu).
   • Temperature telemetry is retrieved via the amdgpu driver interface in sysfs (/sys/class/hwmon), while utilization is read from card device activity (gpu_busy_percent).
2. Accurate Hardware Model Names:
   • CPU: Read and parsed directly from /proc/cpuinfo.
   • dGPU: Scanned via PCI class 0300/0302 and resolved using the udev database.
   • iGPU (AMD): Resolves exact marketing model names (e.g., "AMD Radeon 610M") by querying /usr/share/libdrm/amdgpu.ids with the PCI device ID and revision hex (read from sysfs), avoiding generic architecture codenames like "Raphael".
   • iGPU (Intel): Resolved using the standard PCI database mappings in udev.
3. UI Layout Polish:
   • Corrected vertical stretching in the Hardware Monitor panel. Added elastic Rectangle {} spacers at the bottom of both vertical columns to pack all labels (including CPU, GPU, iGPU, and Fans) tightly to the top with uniform spacing, preventing them from stretching when columns have mismatched heights.

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Changed Files

• rog-control-center/Cargo.toml:
  • Added udev.workspace = true to dependencies.
• rog-control-center/ui/pages/system.slint:
  • Added new properties to SystemPageData (cpu_name, igpu_name, dgpu_name, igpu_temp_val, igpu_usage_val, has_igpu).
  • Updated headers to display processor models in parentheses.
  • Added the iGPU Status block under the CPU block.
  • Appended spacer springs at the bottom of columns to pack layouts cleanly.
• rog-control-center/src/ui/setup_system.rs:
  • Implemented /proc/cpuinfo parsing for CPU models.
  • Implemented /usr/share/libdrm/amdgpu.ids parser with PCI device and revision key match.
  • Scanned PCI display devices at startup and bound model properties to the Slint UI.
  • Added iGPU temperature/utilization checks to the background thread telemetry loop.

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Verification & Checks Done

• Build check: cargo check -p rog-control-center runs and compiles cleanly.
• Linting: Verified zero clippy warnings via cargo clippy -p rog-control-center --all-targets.
• Formatting: Ran cargo fmt to align with the codebase coding standards.

Closes: #178

[Ghoul4500]

LGTM. Thank you for your contribution!