XX-4050 / Send E2E test

README.md

examples/ndf.json

examples/sendE2E/index.html

examples/sendE2E/index2.html

examples/sendE2E/receiver-favicon.ico

examples/sendE2E/sender-favicon.ico

examples/sendE2E/xxdk.js

examples/styles.css

go.mod

go.sum

main.go

test/assets/wasm_exec.js

test/index.html

test/main.go

utils/array.go

utils/array_test.go

utils/convert.go

utils/convert_test.go

utils/utils_js.s

wasm/authenticatedConnection.go