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/sway/config.d/inputs.conf.tmpl

@@ -0,0 +1,10 @@
+{{ if eq .hosttype "laptop" -}}
+input "type:pointer" {
+  accel_profile flat
+  pointer_accel 0
+}
+
+input "2362:4931:PIXA3854:00_093A:1343_Touchpad" {
+  tap enabled
+}
+{{- end }}