fix: Set correct types and annotations for KeyModifiers

[kpaulisse]

Fixes #194

These are the correct types and annotations for KeyModifiers.

I was able to verify that this works with a small test program:

	params := general.NewTriggerHotkeyByKeySequenceParams()
	params = params.WithKeyId("OBS_KEY_NUMPLUS")
	params = params.WithKeyModifiers(&typedefs.KeyModifiers{Shift: true, Control: true, Alt: true})

	if _, err := client.General.TriggerHotkeyByKeySequence(params); err != nil {
		panic(err)
	}

	time.Sleep(1 * time.Second)

	params2 := general.NewTriggerHotkeyByKeySequenceParams()
	params2 = params.WithKeyId("OBS_KEY_NUMPLUS")
	params2 = params.WithKeyModifiers(&typedefs.KeyModifiers{Shift: true, Control: true, Command: true})

	if _, err := client.General.TriggerHotkeyByKeySequence(params2); err != nil {
		panic(err)
	}

[kpaulisse]

Test failures here are also happening in main and don't appear related to my change.

[andreykaipov]

Wow I don't know how long these had the wrong json annotation for! Thanks so much!

I had to rebase off main and pushed it up to this PR after merging #196 in so this could pass.