[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)

fl/.config/whisper/small.env

@@ -0,0 +1,6 @@
+# FAST instance (port 11346) — English-only, ~5x lighter than turbo.
+# Same API; point a client at :11346 instead of :11345 when latency matters more than accuracy.
+# For a multilingual equivalent use ggml-small-q5_1.bin and set WHISPER_LANG=auto.
+WHISPER_MODEL=/home/anon/software/models/ggml-small.en-q5_1.bin
+WHISPER_PORT=11346
+WHISPER_LANG=en