feat: user-agent rotation in existing modules' headers

[alyssazieli3]

Completed Issue #203 by adding a helper function to generate a random user-agent and going through the email_scan\ and user_scan\ sections to replace any hard coded user agents in the headers.

[kaifcodec]

@alyssazieli3 Thank you for stepping forward and opening this PR. I’ve made a few adjustments:

1. Reverted the use of random user-agents in email_scan/ modules, as those modules are sensitive to header changes.
2. Removed the accidentally committed .idea/ directory.
3. Refactored helpers.py and removed the webview/mobile user-agents since some sites were flagging them.

Note: I deleted the accidental pushes since this PR contained multiple file changes and the mistake is understandable. However, be mindful of what you’re pushing in the future. Before committing, always run git status to review your changes.