[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)

common/.config/misc/clis.txt

@@ -0,0 +1,36 @@
+jq
+fq
+rg
+fd
+fzf
+lsd
+bat
+zoxide
+resvg
+mosh
+tennis
+dysk
+dust
+scrcpy
+adb
+gpg
+fnm
+recfmt
+recsel
+pass
+xxd
+voxcii
+tldr
+rsync
+cowsay
+fortune
+lolcat
+glow
+pake
+bwrap
+dog
+nmap
+traceroute
+fuck
+atool
+aria2c