This adds a `toggleVisibility` parameter to `globalSummon`.
* When `true` (default): when you press the global summon keybinding, and the window is currently the foreground window, we'll minimize the window.
* When `false`, we'll just do nothing.
## References
* Original thread: #653
* Spec: #9274
* megathread: #8888
## PR Checklist
* [x] Checks a box in #8888
* [x] closes https://github.com/microsoft/terminal/projects/5#card-59030814
* [x] I work here
* [ ] No tests for this one.
* [ ] yes yes eventually I'll come back on the docs
## Detailed Description of the Pull Request / Additional comments
I've got nothing extra to add here. This one's pretty simple. I'm only targeting #9954 since that one laid so much foundation to build on, with the `SummonBehavior`
## Validation Steps Performed
Played with this for a while, and it's amazing.
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