Refactor: Modularize the code

[guptamukund22]

• Refactored API client to introduce modular HTTP handlers (httpGet, httpPost, httpDelete) for improved code readability, maintainability, and reduced redundancy across API endpoint methods.

[pavanjoshi914]

most of the changes look irrelevant here. https://github.com/getAlby/js-sdk/blob/master/.vscode/settings.json we use prettier for formatting and enforce traillingComma rule on code formats. and i guess you just removed at most of the place. can you update this pr to undo this?

[guptamukund22]

I have fixed the formatting issues using prettier. Please let me know if any other changes are needed.

[rolznz]

Hi @guptamukund22 could you fix the conflict? and @pavanjoshi914 could you do a more thorough review?