Make the rice shareable: appearance-only default, --with-shell, --layouts, --restore, 07-input and 99-personal split

- default install: SwayFX + DMS + kitty + fonts/theme + hotkeys/screenshots only
- zsh/tmux/CLI tools behind --with-shell; personal apps/autostart/mouse speed removed from the repo
- keyboard layouts prompt/--layouts, user-editable files (07-input.conf, dms/settings.json) never overwritten
- --restore (oldest backup), unique backup dirs, README rewritten for strangers, private URL removed

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.config/sway/config.d/07-input.conf

@@ -0,0 +1,16 @@
+# Input devices: edit freely. install.sh --layouts "us,de" rewrites the keyboard line.
+# Keep a Latin layout FIRST: the hotkeys are bound with --to-code and work on the other layouts too.
+input "type:keyboard" {
+    xkb_layout "us,ru"
+    xkb_options "grp:alt_shift_toggle,grp_led:scroll"
+}
+
+input type:touchpad {
+    tap enabled
+    tap_button_map lrm
+    natural_scroll enabled
+    dwt enabled
+    middle_emulation enabled
+}
+
+# Mouse / touchpad speed (-1 slowest .. 1 fastest) goes into your own config.d/99-personal.conf