tweak(input/five): release cursor capture for the game's cursor

[blattersturm]

Custom bits of UI (NUI focus, as well as the F8 console/dear ImGui) do this already, which makes the game's mouse cursor (such as in the pause menu) behave differently.

This commit solves this by hooking up the QueryMayLockCursor event to a flag specifying if the cursor is visible.

Feature was requested in DMs by @summeryukata at some point:

is there a way to make fivem not confine the cursor
like, when i have f8 open i can drag it out no problem, but if I pause it keeps it locked to the window

Goal of this PR

Add a little feature for consistency.

How is this PR achieving the goal

Implements the feature.

This PR applies to the following area(s)

FiveM, rage:input:five

Successfully tested on

Game builds: 1604-3095

Platforms: Windows

Checklist

• Code compiles and has been tested successfully.
• Code explains itself well and/or is documented.
• My commit message explains what the changes do and what they are for.
• No extra compilation warnings are added by these changes.

(force-pushed as commit signing did not work first try - used the wrong key for the committer identity, then forgot -S the second time)