Create an front End

[telecomsxchange]

Description:

Create a web-based user interface (UI) for both smpp nodejs scripts (send.js and perftest.js). The UI should allow users to submit system_id, password, host, port, and short_message using a form. Additionally, the short_message field should include a data coding schema switcher to allow users to switch between different encoding options. The most important encoding values should be included, such as GSM7, standard ISO-8859-1, and UTF-16.

The UI should also include a simple dark mode/light mode switcher to improve user experience. The aim of this issue is to improve the usability of the smpp nodejs scripts by providing an intuitive web-based interface for users to interact with.

Please create the necessary HTML, CSS, and JavaScript files and modify the existing scripts as needed to ensure proper integration.

Thank you!