Handle with more inputs payloads

[Matheus2608]

Current app only handles with one payload being changed and only one text area provided for that input
If there is more than one place between §, probably the app will put the same payload in all these placeholders

Objective

Front-End

• Javascript code to create more textarea to put the other payloads (if there is more than one)
• Javascript code to detect how many places the user wants to change
• Javascript code to hide the other text area from other payloads while the user is writting on another one
• Request to server needs to have all these paylaods in a nice, readable, and easy formatable format

Back-End

• Add logic to put each payload on the right position
• Make http request with no errors
• Extensible code for future commits

[Matheus2608]

Already pushed this change to main branche. Forgot to close this issue. Closing now!