Add global profile toggle hotkey + apply .NET 4.8 upgrade baseline

[Copilot]

Introduce a global hotkey to toggle per-application vibrance/brightness/contrast/gamma, and align the branch with the .NET Framework 4.8 upgrade baseline needed for local VS builds.

• Hotkey toggle feature
  • Add settings UI to enable the toggle and capture key combos.
  • Register/unregister global hotkey and toggle the active app’s profile on demand.
  • Persist toggle enablement, hotkey binding, and toggle state across sessions.
• Profile apply/revert logic
  • Wire hotkey toggles to apply/revert vibrance + gamma ramp settings without touching resolution.
• .NET 4.8 upgrade baseline
  • Update csproj, App.config, packages, Fody schema, designers, and .gitignore to match the 4.8 upgrade branch.

_v.SetProfileToggleEnabled(isProfileToggleFeatureEnabled);
_v.SetProfileToggleState(profileToggleState);
_v.ApplyProfileToggle(activeWindowHandle, processName, newToggleState);

Original prompt

I want a new branch and feature - I want to be able to change the settings like vibrance, ingame brightness, ingame contrast and ingame gamma with a global toggle hotkey that will toggle the settings applied for the current running application, if toggled off everything will go back to default value, if toggled on the profile kicks in again, by default when starting an application it should be on the same as the current behaviour, dont do anything with resolution, so enabling this feature will have to be a tickbox in the settings, if the tickbox is selected an option to map the hotkey will appear, for example users may map it to F12 or alt+c or alt+shift+x etc.

to note for brightness, contrast and gamma to be enabled a never change color settings tickbox has to be unselected - not sure this will change your implementation but good to consider. write good clean code that the repo mainter will want to merge.

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[harisonw]

@copilot continue until fully complete

[Copilot]

@copilot continue until fully complete

Completed the remaining hotkey toggle feature work (UI, hotkey capture/registration, persisted toggle state, and apply/revert logic) in commit 29ffb6b. Screenshot: https://github.com/user-attachments/assets/59105d72-86c6-4694-9bb2-a48f8de892e0

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