Use luals-stubs as the source of truth for docs, instead of maintaining

separate docs stubs

Includes introducing a cool new script to turn lua-language-server's
json output into markdown documentation.

luals-stubs/display.lua

@@ -0,0 +1,9 @@
+--- @meta
+
+--- The `display` module contains Properties relating to the device's physical
+--- display.
+--- @class display
+--- @field brightness Property The screen's current brightness, as a gamma-corrected percentage value from 0 to 100.
+local display = {}
+
+return display