feat(hyprland): SUPER+0 → workspace 10; migration doc gains autoLogin

Workspace binds were generated for 1-9 only, leaving SUPER+0 dead.
Generate 10, with the 0 key mapping to workspace 10 (and SHIFT+0 to
move); cheatsheet updated to match.

MIGRATION.md's example system.nix now includes
nomarchy.system.greeter.autoLogin — the migration path missed what
nomarchy-install sets on every LUKS machine, so migrated boxes stopped
at tuigreet asking for a password behind the LUKS prompt.

Verified: nix flake check --no-build passes; generated
homeConfigurations.nomarchy hyprland binds eval'd and contain
'$mod, 0, workspace, 10' + SHIFT variant. V3 next: rebuild on the
migrated T14s (TuringMachine) and press SUPER+0.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/MIGRATION.md

@@ -169,6 +169,11 @@ ryzenadj)**, **no Secure Boot**, and the **stateVersion override**.
   nomarchy.hardware.amd.enable = true;       # amd-pstate + radeonsi VA-API
   # nomarchy.hardware.amd.rocm.enable = true; # opt-in GPU compute (multi-GB)
 
+  # LUKS machines: the disk passphrase already gates access, so boot
+  # straight into the session — this is what nomarchy-install sets on
+  # encrypted installs. Omit it on unencrypted machines.
+  nomarchy.system.greeter.autoLogin = username;
+
   # CRITICAL: keep your ORIGINAL install's value — never Nomarchy's 26.05.
   system.stateVersion = "24.11";
 }