[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.

common/.config/misc/tuis.txt

@@ -0,0 +1,72 @@
+browsh
+wiki-tui
+wikiman
+yazi
+tdf
+dysk
+dust
+ncdu
+duf
+systemctl-tui
+btop
+bandwhich
+mtr
+gping
+bmon
+profanity
+nmtui
+impala
+bluetui
+sshm
+aichat
+tt
+gittype
+toofan
+pastel
+hexyl
+tmux
+zellij
+nvim
+vim
+tetrigo
+pyradio
+px7-radio
+kew
+cmatrix
+neo-matrix
+cava
+pipes-rs
+asciiquarium
+cbonsai
+tclock
+hunk
+gittop
+lazygit
+lazyjournal
+lazydocker
+lazyrsync
+ctop
+colima
+dive
+asciinema
+posting
+serie
+clx
+whosthere
+voxcii
+bookokrat
+tennis
+llmfit
+termdraw
+torlink
+riptide
+quien
+eilmeldung
+calcure
+weathr
+hyprmon
+hulak
+netwatch
+gpk
+circumflex
+darya