add(examples/elements): mouse clickable button

build.zig

@@ -6,6 +6,7 @@ pub fn build(b: *std.Build) void {
 
     const Examples = enum {
         // elements:
+        button,
         input,
         scrollable,
         // layouts:
@@ -38,9 +39,17 @@ pub fn build(b: *std.Build) void {
     //--- Examples ---
 
     // elements:
+    const button = b.addExecutable(.{
+        .name = "button",
+        .root_source_file = b.path("examples/elements/button.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+    button.root_module.addImport("zterm", lib);
+
     const input = b.addExecutable(.{
         .name = "input",
-        .root_source_file = b.path("examples/input.zig"),
+        .root_source_file = b.path("examples/elements/input.zig"),
         .target = target,
         .optimize = optimize,
     });
@@ -90,6 +99,7 @@ pub fn build(b: *std.Build) void {
     // mapping of user selected example to compile step
     const exe = switch (example) {
         // elements:
+        .button => button,
         .input => input,
         .scrollable => scrollable,
         // layouts: