Split the end-user omarchy skill into topic guides (#6602)

* Split the end-user omarchy skill into topic guides

Move default/omarchy-skill to default/agents/skills/omarchy and break the
monolithic SKILL.md into on-demand topic files for Hyprland config, shell
plugins, theming, and hooks. Update the skill symlink wiring, relink
existing installs through a migration, and correct claims that had drifted
from the implementation: plugin hot-reload, terminal reload, menu
customization, refresh scopes, theme overlays, background locations, hook
timing, and the packaged (not git-managed) system directory.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Add capture and contributing guides to the omarchy skill

Cover screenshots, screen recording, OCR text capture, and LocalSend or
Taildrop sharing, plus how to route bug reports, suggestions, and support
questions upstream with diagnostics and captures of the problem attached.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Scope Hyprland reload guidance to the Lua config files

hyprsunset.conf and xdph.conf are read by separate processes, so hyprctl
neither applies nor validates them. Document restarting hyprsunset after
editing its config, including in the night light example.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

docs/file-layout.md

@@ -165,7 +165,7 @@ Runs once per user. It does **not** copy `~/.config/**`, `~/.bashrc`,
 It only does the things `/etc/skel` can't:
 
 - Skill symlinks `~/.{agents,claude,codex,pi/agent}/skills/omarchy` →
-  `$OMARCHY_PATH/default/omarchy-skill`. Symlinks (not copies) so
+  `$OMARCHY_PATH/default/agents/skills/omarchy`. Symlinks (not copies) so
   `omarchy dev link` against a dev checkout repoints them correctly.
 - `xdg-user-dirs-update` (Templates/Public/Desktop folded back into `$HOME`)
   and `~/.config/gtk-3.0/bookmarks` (needs `$HOME` expansion).