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/teams-for-linux/config.json

@@ -0,0 +1,16 @@
+{
+  "media": {
+    "camera": {
+      "autoAdjustAspectRatio": { "enabled": true },
+      "resolution": {
+        "enabled": true,
+        "mode": "override",
+        "width": 1920,
+        "height": 1080
+      }
+    },
+    "video": {
+      "menuEnabled": true
+    }
+  }
+}