[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/classic.conf

@@ -0,0 +1,18 @@
+# ----------------------------------------------------- 
+# ▄▀█ █▄░█ █ █▀▄▀█ ▄▀█ ▀█▀ █ █▀█ █▄░█
+# █▀█ █░▀█ █ █░▀░█ █▀█ ░█░ █ █▄█ █░▀█
+#
+# name "Classic"
+# credit https://github.com/mylinuxforwork/dotfiles
+# ----------------------------------------------------- 
+
+animations {
+    enabled = true
+    bezier = myBezier, 0.05, 0.9, 0.1, 1.05
+    animation = windows, 1, 7, myBezier
+    animation = windowsOut, 1, 7, default, popin 80%
+    animation = border, 1, 10, default
+    animation = borderangle, 1, 8, default
+    animation = fade, 1, 7, default
+    animation = workspaces, 1, 6, default
+}