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/workspaces

@@ -0,0 +1,14 @@
+  "sway/workspaces": {
+    "persistent-workspaces": {
+{{- range $ws := .ws }}
+      "{{ $ws }}": ["{{ $.out }}"],
+{{- end }}
+    },
+    "disable-scroll": true,
+    "sort-by-name": true,
+    "format": "{icon}",
+    "format-icons": {
+      "default": "<span color=\"#cdd6f4\">●</span>",
+      "focused": "<span color=\"#fab387\">●</span>",
+    },
+  },