Add global javadoc symbol and update markdown formatting

[muczc1wek]

Functions that change global variables could now be properly described, also the headers were added to improve readability.

/// Inserts an NPC into the world at the specified spawn point
///
/// @global self set to the inserted NPC
/// @param npcinstance instance ID of the NPC
/// @param spawnpoint name of the spawn point (waypoint or object)
func void Wld_InsertNpc(var int npcinstance, var string spawnpoint) {};

[kirides]

Looks great 👍

Would you mind to also adjust the parameters to use markdown inline code syntax for the name? (the back ticks instead of **)

[muczc1wek]

Formatting updated, also typo in Builtins fixed 😜

[kirides]

LGTM