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

dot_config/waybar/waybar-roon.json

@@ -0,0 +1,12 @@
+{
+    "zone_name": "SMSL 400",
+    "format": {
+        "playing": "󰐊 {artist} - {title}",
+        "paused": "󰏤 {artist} - {title}",
+        "stopped": "󰓛 Stopped",
+        "loading": "󰄰 Loading...",
+        "no_zone": "󰓛 No Zone"
+    },
+    "max_length": 60,
+    "update_interval": 1
+}