Add better and configurable shortcuts.

build.zig

@@ -115,6 +115,21 @@ pub fn build(b: *std.Build) void {
     settings_tests.root_module.addImport("ghostty-vt", ghostty.module("ghostty-vt"));
     test_step.dependOn(&b.addRunArtifact(settings_tests).step);
 
+    // The shortcut table is its own root for the same reason: chords are parsed
+    // from text, written back out as text, and looked up by a key press, and
+    // all three are pure data. It reaches libghostty-vt for the key enum and
+    // nothing else, which is what keeps it — and the settings tests above, which
+    // import it — off GTK.
+    const shortcut_tests = b.addTest(.{
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("src/shortcuts.zig"),
+            .target = target,
+            .optimize = optimize,
+        }),
+    });
+    shortcut_tests.root_module.addImport("ghostty-vt", ghostty.module("ghostty-vt"));
+    test_step.dependOn(&b.addRunArtifact(shortcut_tests).step);
+
     // A second root for the same reason, one step further out: `emoji.zig` is a
     // table and a search over it, and it imports nothing at all. It cannot hang
     // off the root above because a test binary has exactly one root, and