Feature Request: Scheduled Startup Manager (Advanced Autostart Control)

### Description of the new feature / enhancement

The proposed feature is a new PowerToys utility (e.g., "PowerStart" or "Startup Scheduler") that allows users to manage their startup applications based on a schedule.

Currently, the Windows Task Manager only allows a binary choice: an app starts every time the system boots, or it doesn't. This utility would allow users to:

Toggle startup apps based on days of the week: For example, work-related apps (Slack, Teams, VPN) only launch automatically from Monday to Friday.
Set specific triggers: Launch certain apps only on weekends or specific days.
Delay Start: Add a custom delay (e.g., 30 seconds after login) to prevent system lag during boot, combined with the daily schedule.
The interface could look like a list of startup items with a 7-day checkbox matrix (M T W T F S S) next to each entry.

### Scenario when this would be used?

This feature is essential for users who use the same PC for both professional work and personal entertainment/gaming:

Work-Life Balance: A user works from Monday to Friday. They want their heavy "work suite" (Docker, IDEs, Communication tools) to start automatically during those days. On Saturday and Sunday, they want a "clean" system boot to maximize performance for gaming or personal projects without manual closing of work apps.
System Performance: Many users have apps they only need occasionally (e.g., update checkers, specialized drivers for a hobby). Instead of having them run every single day, they could schedule them to run only once a week (e.g., on Mondays).
Reducing "Startup Impact": Even with SSDs, dozens of apps launching simultaneously can slow down the initial login experience. Scheduling them prevents unnecessary resource consumption on days they aren't needed.

### Supporting information

Technical Implementation: This could be implemented by PowerToys managing a background service that triggers the apps, or by modifying the Registry/Task Scheduler entries dynamically.
Existing gap: While "Task Scheduler" in Windows can do this, its UI is outdated, complex, and not user-friendly for the average person who just wants to manage their "Startup" folder.
UI Inspiration: Similar to how the "Quiet Hours" or "Night Light" settings work, but applied to the list of applications found in Task Manager > Startup.

No files, tests, or entry points are named. Start by reviewing the existing PowerToys utility structure and Windows startup and Task Scheduler behavior. Done would require an agreed scope and a complete utility that schedules selected startup apps by day and delay.

Written by the indexing model from the issue text.