[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.

wm/.config/hypr/animations/theme.conf

@@ -0,0 +1,23 @@
+# This file is generated by wallbash:animations.dcol
+
+# // ▄▀█ █▄░█ █ █▀▄▀█ ▄▀█ ▀█▀ █ █▀█ █▄░█
+# // █▀█ █░▀█ █ █░▀░█ █▀█ ░█░ █ █▄█ █░▀█
+
+# See https://wiki.hyprland.org/Configuring/Animations/
+# credits: https://github.com/prasanthrangan/hyprdots
+
+animations {
+    enabled = yes
+    bezier = wind, 0.05, 0.9, 0.1, 1.05
+    bezier = winIn, 0.1, 1.1, 0.1, 1.1
+    bezier = winOut, 0.3, -0.3, 0, 1
+    bezier = liner, 1, 1, 1, 1
+    animation = windows, 1, 6, wind, slide
+    animation = windowsIn, 1, 6, winIn, slide
+    animation = windowsOut, 1, 5, winOut, slide
+    animation = windowsMove, 1, 5, wind, slide
+    animation = border, 1, 1, liner
+    animation = borderangle, 1, 30, liner, once
+    animation = fade, 1, 10, default
+    animation = workspaces, 1, 5, wind
+}