[Sync] replace the flat layout with the unified stow tree

Supersedes the old flat .config/ layout (last published 2026-06-28) with the
private repo's structure: one shared base plus per-host overlays.

- packages: common/ gui/ lw/ fl/ wm/ plus install.sh and bin/ tooling
  (dotsync, reconcile-hyde.sh)
- new README covering the layout, deploy order and the HyDE dependency
- current HyDE waybar rig (layouts/, cava), pi agent extensions, claude/
  config, tmux, presenterm, aichat roles
- fish: kp (keepassxc-cli + fzf picker, db path from $KP_DB) and
  bind_M_n_history (alt+1..9 recalls the nth history entry)
- drops cruft that should never have been tracked: the duplicate top-level
  .pi/ copy, btop.log, zellij config.kdl.bak, fish_variables
- .pi/agent/auth.json is gitignored; auth.json.example ships instead

Host-specific work sessions and the personal backlog stay in the private
tree. Endpoint locators in the llamacpp/whisper guides are placeholders
($SERVER, <own-domain>) — the guides themselves stay, since they are the
useful part.

gui/.config/hypr/animations.conf

@@ -0,0 +1,12 @@
+# ▄▀█ █▄░█ █ █▀▄▀█ ▄▀█ ▀█▀ █ █▀█ █▄░█
+# █▀█ █░▀█ █ █░▀░█ █▀█ ░█░ █ █▄█ █░▀█
+#
+# See https://wiki.hypr.land/Configuring/Animations/
+# Edit or add presets in ./animations/, then run 'animations.sh --select' to switch.
+# (noanim layerrules for hyprpicker/selection live in userprefs.conf)
+
+$ANIMATION=theme
+# Absolute, not ./ — HyDE re-sources $ANIMATION_PATH from ~/.local/share/hyde/hyprland.conf,
+# where a relative path resolves against that directory instead of this one.
+$ANIMATION_PATH=~/.config/hypr/animations/theme.conf
+source = $ANIMATION_PATH