Restore nymph hardware and power management config

Re-add NVIDIA/Intel GPU packages, tlp/power-profiles-daemon, and
emptty error logging to host_vars/nymph.yml — these were dropped
when the Arch path was removed but are independent of Arch and
needed for nymph laptop hardware. Drop two orphaned Wayland/Sway
residues: kanshi config and the historical Sway cleanup script.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ansible/inventory/host_vars/nymph.yml

@@ -6,3 +6,19 @@ desktop_sessions_enabled:
 
 desktop_default_session: i3
 desktop_default_session_env: xorg
+desktop_emptty_session_error_logging: rotate
+
+host_packages:
+  - nvidia
+  - linux-mainline-headers
+  - mesa-dri
+  - vulkan-loader
+  - mesa-vulkan-intel
+  - intel-video-accel
+  - power-profiles-daemon
+  - tlp
+  - tlp-rdw
+  - upower
+
+host_enabled_services:
+  - tlp