feat(hyprland): launch-or-focus binds (item 17)

nomarchy.launchOrFocus (opt-in, commented template example): each
entry gives a key that FOCUSES the app's existing window
(case-insensitive class match via jq + a "(?i)" focuswindow regex) or
launches it when none is open. One shared nomarchy-focus-or-launch
script; a bind whose command was removed from the suite fires a
"not installed" toast instead of failing silently. The same entries
render into the SUPER+? cheatsheet through prettyKeys — bind and
documentation stay one source. README row added.

Verified: V0; V1 — a scratch downstream with two entries renders both
binds (default command = lowercased class; custom mods/command/desc
honored), the script passes bash -n with a usage guard, and the
cheatsheet carries both rows. Focus behaviour needs a session -> V3
(HARDWARE-QUEUE).

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

README.md

@@ -229,6 +229,7 @@ two tables below are split along exactly that line.
 | `nomarchy.mime.enable` | `true` | Default "open with" associations (PDF/image/video/text/browser/directory); entries for apps you removed are skipped, so it degrades with the suite |
 | `nomarchy.monitors` | `[]` | Declarative per-output layout → Hyprland `monitor` rules (applied on hotplug); `,preferred,auto,1` wildcard kept as fallback |
 | `nomarchy.displayProfiles` | `{}` | Named layouts for the same outputs (docked/undocked/…), switched from System › Display › Profiles: instant via hyprctl, persisted in-flake (`settings.displayProfile`), baked over `nomarchy.monitors` at the next rebuild. The menu's Auto-switch row (`settings.displayProfileAuto`) makes plugging/unplugging outputs apply the matching profile automatically |
+| `nomarchy.launchOrFocus` | `[]` | Launch-or-focus binds: `SUPER+<key>` focuses the app's window (case-insensitive class match) or launches it; entries land in the SUPER+? cheatsheet, and a bind whose app was removed notifies instead of failing silently |
 | `nomarchy.themesDir` | Nomarchy's `themes/` | Where per-theme app overrides are probed |
 | `nomarchy.package` | overlay's `nomarchy-theme-sync` | The theme/state tool package, overridable if you fork it |