feat: Prevent screen sleep during generation

[zero41120]

Description

• Add a new option opts.prevent_screen_sleep_during_generation
• Added a new feature to request a wake lock to prevent the screen from going to sleep during ongoing image generation progress.

Screenshots/videos:

• Started a long job and walked away.
• Came back to the screen still on, showing a job that could take more than 2 hours.

- Setting page

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests
  • Unable to verify tests fully. My MacBook Pro M3pro on master without any changes does not pass all tests.
  • Changes in this PR are UI only. No changes to Python or other server-side code. It is unlikely that these changes will affect existing functionality.

[AUTOMATIC1111]

remove console.log; and the comment that says the same thing as the function name right after is somewhat redundant