Add AUTHORS.md with list of main contributors

Fixes #1489.

AUTHORS.md

@@ -0,0 +1,53 @@
+# Godot Engine documentation authors
+
+Godot Engine is developed by a community of voluntary contributors who
+contribute on all areas, including writing and maintaining the documentation.
+
+It is impossible to list them all; nevertheless, this file aims at listing
+the writers who contributed significant patches to this CC-BY licensed
+documentation on the `godot-docs` repository.
+
+GitHub usernames are indicated in parentheses, or as sole entry when no other
+name is available.
+
+## Main contributors
+
+(in alphabetical order, with over 10 commits excluding merges)
+
+Aaron Franke (aaronfranke)
+Andrew Conrad (her001)
+Andrii Doroshenko (Xrayez)
+Arman (puchik)
+Bastiaan Olij (BastiaanOlij)
+bitbutter
+Camille Mohr-Daurat (pouleyKetchoupp)
+Chris Bradfield (cbscribe)
+Clay John (clayjohn)
+corrigentia
+Fabio Alessandrelli (Faless)
+FeralBytes
+Frido (mega-bit)
+George Marques (vnen)
+Gerrit Großkopf (Grosskopf)
+Griatch
+Haoyu Qiu (timothyqiu)
+Hugo Locurcio (Calinou)
+Ignacio Roldán Etcheverry (neikeq)
+Jérôme Gully (Nutriz)
+Juan Linietsky (reduz)
+Julian Murgia (StraToN)
+Kelly Thomas (KellyThomas)
+Leon Krause (leonkrause)
+Matthew (skyace65)
+Max Hilbrunner (mhilbrunner)
+Michael Alexsander (YeldhamDev)
+Nathan Lovato (NathanLovato)
+Paul Joannon (paulloz)
+Poommetee Ketson (Naryosha)
+Rémi Verschelde (akien-mga)
+Tomasz Chabora (KoBeWi)
+TwistedTwigleg
+Will Nations (willnationsdev)
+Yuri Roubinsky (Chaosus)
+Yuri Sizov (pycbouh)
+ZX-WT