docs: Add screenhot of gui #711

Job	Run time
check_stable	1m 12s
bdk_test	3m 55s
build (x86_64-unknown-linux-gnu, ubuntu-latest)	2m 18s
build (armv7-unknown-linux-gnueabihf, ubuntu-latest)	7m 1s
build (x86_64-apple-darwin, macos-12)	4m 2s
rpc_tests	4m 0s
sqlx_test	1m 8s
build (aarch64-apple-darwin, macos-latest)	2m 24s
docker_tests (happy_path)	3m 46s
build (x86_64-pc-windows-msvc, windows-latest)	6m 35s
static_analysis	1m 43s
test (ubuntu-latest)	5h 57m 13s
test (macos-latest)	6h 0m 16s
docker_tests (happy_path_restart_bob_after_xmr_locked)	3m 17s
docker_tests (happy_path_restart_bob_before_xmr_locked)	3m 27s
docker_tests (happy_path_restart_alice_after_xmr_locked)	3m 20s
docker_tests (alice_and_bob_refund_using_cancel_and_refund_command)	3m 13s
docker_tests (alice_and_bob_refund_using_cancel_then_refund_command)	3m 8s
docker_tests (alice_and_bob_refund_using_cancel_and_refund_command_timelock_not_expired)	2m 49s
docker_tests (alice_manually_punishes_after_bob_dead_and_bob_cancels)	3m 15s
docker_tests (punish)	4m 10s
docker_tests (alice_punishes_after_restart_bob_dead)	3m 54s
docker_tests (alice_manually_punishes_after_bob_dead)	4m 3s
docker_tests (alice_refunds_after_restart_bob_refunded)	3m 9s
docker_tests (ensure_same_swap_id)	2m 48s
docker_tests (concurrent_bobs_before_xmr_lock_proof_sent)	3m 58s
docker_tests (concurrent_bobs_after_xmr_lock_proof_sent)	5m 12s
docker_tests (alice_manually_redeems_after_enc_sig_learned)	3m 23s
docker_tests (happy_path_bob_offline_while_alice_redeems_btc)	6m 23s
	13h 35m 2s

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