add flashless blinky examples for pico2

Author: tact1m4n3

examples/raspberrypi/rp2xxx/build.zig

@@ -26,6 +26,8 @@ pub fn build(b: *std.Build) void {
         .{ .target = raspberrypi.pico, .name = "pico_pcf8574", .file = "src/rp2040_only/pcf8574.zig" },
         .{ .target = raspberrypi.pico, .name = "pico_i2c_slave", .file = "src/rp2040_only/i2c_slave.zig" },
         .{ .target = raspberrypi.pico_flashless, .name = "pico_flashless_blinky", .file = "src/blinky.zig" },
+        .{ .target = raspberrypi.pico2_arm_flashless, .name = "pico2_arm_flashless_blinky", .file = "src/blinky.zig" },
+        .{ .target = raspberrypi.pico2_riscv_flashless, .name = "pico2_riscv_flashless_blinky", .file = "src/blinky.zig" },
 
         .{ .target = raspberrypi.pico2_arm, .name = "pico2_arm_random_data", .file = "src/rp2350_only/random_data.zig" },
         .{ .target = raspberrypi.pico2_riscv, .name = "pico2_riscv_random_data", .file = "src/rp2350_only/random_data.zig" },