Update ToggleSwitch add OffContent and OnContent

[zh3305]

Pull request type

Please check the type of change your PR introduces:

• Update
• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes

What is the current behavior?

[LHTXQ]

This change decision is unreasonable, content should be driven by binding variables instead of setting content separately for both states.

[zh3305]

This change decision is unreasonable, content should be driven by binding variables instead of setting content separately for both states.

I don't want to bind too many variables to handle this switch change, and I don't want to handle this unique change by converting when there are multiple states such as switch, split, and close, which makes the code bloated. I looked at the WinUI 3 Gallery code and it solved my problem perfectly. With this change you can still use the Content property to set the label, OffContent OnContent is just an option

[LHTXQ]

This change decision is unreasonable, content should be driven by binding variables instead of setting content separately for both states.

I don't want to bind too many variables to handle this switch change, and I don't want to handle this unique change by converting when there are multiple states such as switch, split, and close, which makes the code bloated. I looked at the WinUI 3 Gallery code and it solved my problem perfectly. With this change you can still use the Content property to set the label, OffContent OnContent is just an option

🤔行吧……