[Refactor] Make InstallModal global with state moved to zustand

[arielj]

This PR moves how we handle the InstallModal rendering and moves the state to Zustand. This helps removing some repeated code and makes opening and closing the modal to produce fewer re-renderings.

This PR changes:

• Currently we have the component rendered inside different components: Library, GamePage, SubMenu, etc. This was like this I imagine to avoid having it global to avoid too many re-rendering, but with the cost of duplicating code for the render and the state
• Even with the previous consideration, the state was still producing unintentional re-renderings, like... clicking the install button on a game in the library would re-render the whole library, or clicking the install button in the game page would re-render the whole page, or clicking Add Game in the library would re-render the whole library. With this PR it won't re-render extra components
• Similar to the game settings PR, I took the opportunity to make the method names and state more declarative, so instead of doing something like setShowModal(false) we can now call closeInstallGameModal()

I tested all the places I could see:

• Install in library
• Install in game page from body
• Install in game page from 3-dots menu
• Edit sideloaded app
• Add sideloaded app
• Install EA game

I think they all work as expected, not sure if I'm missing something to test.

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Use the following Checklist if you have changed something on the Backend or Frontend:

• Tested the feature and it's working on a current and clean install.
• Tested the main App features and they are still working on a current and clean install. (Login, Install, Play, Uninstall, Move games, etc.)
• Created / Updated Tests (If necessary)
• Created / Updated documentation (If necessary)