<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request
Adds new "Off" mode for the schedule mode options which disable the
schedule.
Adds explicit function to disable light switch by default.

<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist

Closes: 
- #42402 
New behavior: "Off" mode added. when off, the regular service loop stops
and all actions are event driven to either resume the loop or listen for
hotkey.
- #42386
New behavior: Disabled explicitly by default
- #42389
New behavior: When switching from dark to light mode the system theme
will remove the accent color.
- #42513
New behavior: Manual mode no longer gets reset. It was being overridden
by the sun calculations that were invertedly running when in manual
mode.

Todo:
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx @alvinashcraft we will need to add this new mode
to the documentation.

## Validation Steps Performed
- Removed all default settings and tested new logic. Light Switch is set
to off by default.
- Updated UI and tested new "Off" mode, logs indicate mode switched and
ticker stopped. Polling resumes on mode change. (need to check that the
shortcut still works)

---------

Co-authored-by: Niels Laute <[email protected]>
Co-authored-by: Gordon Lam <[email protected]>

…changes (#42405)

## Summary of the Pull Request

This PR resolves the issue where the window style WS_EX_TOOLWINDOW was
being set but not properly applied to the window.

<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist

- [x] Closes: #42395
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

…entEx (#42399)

## Summary of the Pull Request

The `XmlDocumentEx::Print` method previously used `<\\` to close XML
tags, which is invalid. This commit replaces `<\\` with `</` to ensure
proper XML closing tag syntax.

Changes include:
- Replacing `<\\` with `</` in three instances where closing tags are
generated.
- Ensuring the XML output conforms to standard XML syntax.

These changes improve the correctness of the XML output generated by the
method.

<img width="1014" height="499" alt="image"
src="https://github.com/user-attachments/assets/a9ff6e47-6976-4290-a4f0-c23b0c773d61"
/>


<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist

- [x] Closes: #42390
- [x] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [x] **Tests:** Added/updated and all pass
- [x] **Localization:** All end-user-facing strings can be localized
- [x] **Dev docs:** Added/updated
- [x] **New binaries:** Added on the required places
- [x] **Documentation updated:** 

<!-- Provide a more detailed description of the PR, other things fixed,
or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed