Migrate to chezmoi with per-host sway/waybar configs

- Restructure repo into chezmoi source layout (dot_ prefix)
- Add .chezmoi.toml.tmpl mapping hostname to hosttype (laptop/desktop)
- Template sway config.d fragments (outputs/inputs/binds) per host
- Template waybar config.jsonc with shared bar/module definitions
- Host-scope pulsemeeter (flow) and teams-for-linux (desktop hosts) via .chezmoiignore
- Trim install.sh package lists to configured software + config deps
- Remove stale kitty.conf.bak and untracked host fragments

.chezmoitemplates/bar-primary

@@ -0,0 +1,11 @@
+{
+  "output": "{{ .out }}",
+  "layer": "top",
+  "position": "left",
+  "width": 44,
+  "modules-left": ["clock", "pulseaudio"],
+  "modules-center": ["sway/workspaces"],
+  "modules-right": ["tray", "battery", "custom/power"],
+{{ template "workspaces" (dict "out" .out "ws" .ws) }}
+{{ template "waybar-modules" . }}
+}