feat(lua): Port of NodeMCU Lua53 read-only tables (#2994)

* chore(lua): revert useless c light function change

This change was part of the eLua LTR patches (based on 5.1), whereby this feature was already integrated in Lua 5.2.

* feat(lua): port of NodeMCU Lua53 read-only tables

# Conflicts:
#	radio/src/lua/CMakeLists.txt
#	radio/src/lua/api_general.cpp

* fix(nv14): missing SDRAM definition

* fix: l_mathop

* fix: use float functions in drawPower()

* fix: ltable resize

* fix: correct name is "bit32"

* fix: first Lua context must be closed last

As the lookup cache is attached to that one

* Revert to Lua using double

* Ensure byte-code compatibility

* Fix possible compatibility issue with `lua_typename`/`luaL_typename`

* Fix Bitmap symbol table

* Re-add table lib for COLORLCD

radio/src/opentx.cpp

@@ -1189,11 +1189,7 @@ void opentxClose(uint8_t shutdown)
   if (shutdown) {
     pulsesStop();
     AUDIO_BYE();
-
-#if defined(LUA)
-    luaClose(&lsScripts);
-#endif
-
+    // TODO needed? telemetryEnd();
 #if defined(HAPTIC)
     hapticOff();
 #endif
@@ -1237,6 +1233,11 @@ void opentxClose(uint8_t shutdown)
   lsWidgets = 0;
 #endif
 #endif
+#if defined(LUA)
+  // the script context needs to be closed *after*
+  // the widgets, as it has been the first to be opened
+  luaClose(&lsScripts);
+#endif
 
 #if defined(SDCARD)
   sdDone();