TLCO fix & boot file extension change (#37)

This commit fixes the TLCO boot option (which hasn't been working for a
while now), and also changes boot file extensions from .boot to .lua.

sys/boot/kiosk.lua

@@ -0,0 +1,40 @@
+local os         = _G.os
+local parallel   = _G.parallel
+local peripheral = _G.peripheral
+local settings   = _G.settings
+local term       = _G.term
+
+local name = settings.get('kiosk.monitor')
+
+if not name then
+	peripheral.find('monitor', function(s)
+		name = s
+	end)
+end
+
+local mon = name and peripheral.wrap(name)
+
+if mon then
+	print("Opus OS is running in Kiosk mode, and the screen will be redirected to the monitor. To undo this, go to the boot option menu by pressing a key while booting, then select the option 2.")
+	term.redirect(mon)
+	mon.setTextScale(tonumber(settings.get('kiosk.textscale')) or 1)
+
+	parallel.waitForAny(
+		function()
+			os.run(_ENV, '/sys/boot/opus.boot')
+		end,
+
+		function()
+			while true do
+				local event, side, x, y = os.pullEventRaw('monitor_touch')
+
+				if event == 'monitor_touch' and side == name then
+					os.queueEvent('mouse_click', 1, x, y)
+					os.queueEvent('mouse_up',    1, x, y)
+				end
+			end
+		end
+	)
+else
+	os.run(_ENV, '/sys/boot/opus.boot')
+end