Initial import: chezmoi source for Omarchy (Hyprland)

Imported from prdlk/dotfiles master (efdd827), which supersedes the omarchy
branch (3031416). Drops the Umbriel, Noctalia, niri, CachyOS, macOS, and Blume
docs-site layers; docs/ is plain Markdown.

dot_config/uwsm/env-hyprland

@@ -0,0 +1,23 @@
+# Sourced by uwsm before Hyprland starts.
+# Keep Hyprland on the AMD iGPU (Radeon 8060S, PCI c4:00.0). The Thunderbolt
+# eGPU (RTX 5060 Ti) drives no displays and is for compute only; without this,
+# aquamarine opens it as a second KMS device. cardN numbering shifts with eGPU
+# hotplug timing, so resolve the stable by-path link. Left unset if missing so
+# Hyprland still falls back to auto-detection.
+igpu=$(readlink -f /dev/dri/by-path/pci-0000:c4:00.0-card 2>/dev/null)
+[ -e "$igpu" ] && export AQ_DRM_DEVICES="$igpu"
+unset igpu
+
+# EGL through Mesa only, for Hyprland and every app in the session. glvnd
+# otherwise tries NVIDIA's vendor first (10_nvidia.json sorts before
+# 50_mesa.json), so the compositor and GL apps open /dev/nvidiactl even
+# though they render on the iGPU; when the eGPU drops off the bus, they
+# would be holding it. CUDA does not go through EGL and is unaffected.
+export __EGL_VENDOR_LIBRARY_FILENAMES=/usr/share/glvnd/egl_vendor.d/50_mesa.json
+
+# Vulkan through RADV only, same reasoning. The eGPU exists for LM Studio's
+# CUDA backend; its Vulkan backend surveying the NVIDIA ICD on first start
+# took the machine down (platform reset, no log) while CUDA work on the same
+# card (voxtype/parakeet) runs fine. Games and every other Vulkan app stay
+# on the iGPU. CUDA does not go through the Vulkan loader.
+export VK_DRIVER_FILES=/usr/share/vulkan/icd.d/radeon_icd.json