[Sync] adopt unified stow layout from the private repo

Mirrors the private dots tree at 900bdda: one shared base plus per-host
overlays, replacing the old flat .config/ layout (last synced 2026-06-28).

- packages: common/ gui/ wm/ lw/ fl/ + install.sh and bin/ tooling (dotsync,
  reconcile-hyde.sh)
- new README (layout, deploy order, HyDE dependency), plus ToDo.md and
  HYDE-UPDATE.md
- current HyDE waybar rig (layouts/, cava), pi agent extensions, claude/
  config, tmux, presenterm, aichat roles
- drops stale duplicates and generated cruft that should never have been
  tracked: the second top-level .pi/ copy, btop.log, zellij config.kdl.bak,
  fish_variables, nvim codecompanion.lua
- .pi/agent/auth.json is gitignored now; auth.json.example ships instead
- fl/ and wm/ hypr themes/ stay untracked (HyDE-generated per machine, per
  the root .gitignore)

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
+}