Added basic Morrowind Scripting parsing

[alecnunn]

After testing on various scripts from Morrowind, I have not noticed anything broken, though I most certainly intend to rework and clean up the regex when possible. Example script below:

;opens first gate as Ghostgate (say that 5 times)
;put on button

float timer
short state

if ( MenuMode == 1 )
	return
endif

if ( OnActivate == 1 )
	
	if ( GG_Gate1_State == 0 ) 
		PlaySound "Open Lock"
		"ex_gg_portcullis_01"->Playsound3DVP "Dwemer Door Open" 1.0 1.0
		set GG_Gate1_State to 10
		set state to 10
	endif
endif

if ( State >= 10 )
	
	set timer to ( timer + GetSecondsPassed )

	;move gate up (210 units)
	if ( timer < 3 )
		"ex_gg_portcullis_01"->MoveWorld z 70

	;set back to start
	elseif ( timer > 21 )
			"ex_gg_portcullis_01"->SetAtStart
			set State to 0
			;can now press button again
			set GG_Gate1_State to 0
			set timer to 0

	;move gate down (210 units)
	elseif ( timer > 18 )
			;use state so sound only plays once			
			if ( State == 10 )
				"ex_gg_portcullis_01"->Playsound3DVP "Dwemer Door Open" 1.0 1.0
				Set State to 20
			endif
			"ex_gg_portcullis_01"->MoveWorld z -70
	endif
endif

end GG_OpenGate1```