feat: websocket improve to fix issue #7268 including support authentication

[sofia-fernandez-six]

Summary

In this pull request, the following changes are made:

• Added authentication support for WebSocket Upgrade monitors and added section in UI with:
  • HTTP Basic Auth
  • OAuth2 Client Credentials
  • mTLS
• Added support for custom WebSocket handshake headers.
• Added a dedicated WebSocket Options section in the monitor edit UI.
• Added backend tests for WebSocket
• Relates to Add protection(authentication) via mTLS (client certificate), basic auth or oauth for WebSocket monitors (wss:// upgrade) #7268
• Resolves Add protection(authentication) via mTLS (client certificate), basic auth or oauth for WebSocket monitors (wss:// upgrade) #7268

Please follow this checklist to avoid unnecessary back and forth (click to expand)

• ⚠️ If there are Breaking change (a fix or feature that alters existing functionality in a way that could cause issues) I have called them out
• 🧠 I have disclosed any use of LLMs/AI in this contribution and reviewed all generated content.
  I understand that I am responsible for and able to explain every line of code I submit.
• 🔍 Any UI changes adhere to visual style of this project.
• 🛠️ I have self-reviewed and self-tested my code to ensure it works as expected.
• 📝 I have commented my code, especially in hard-to-understand areas (e.g., using JSDoc for methods).
• 🤖 I added or updated automated tests where appropriate.
• 📄 Documentation updates are included (if applicable).
• 🧰 Dependency updates are listed and explained.
• ⚠️ CI passes and is green.

Screenshots for Visual Changes

• UI Modifications:
  • Added a WebSocket Options section.
  • Added an Authentication section for WebSocket Upgrade monitors.
  • Added fields for custom headers and auth configuration.

[github-actions]

Hello and thanks for lending a paw to Uptime Kuma! 🐻👋
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In particular: - Mark your PR as Draft while you’re still making changes - Mark it as Ready for review once it’s fully ready
If you have any design or process questions, feel free to ask them right here in this pull request - unclear documentation is a bug too.

[github-actions]

@sofia-fernandez-six congrats on your first contribution to Uptime Kuma! 🐻
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