[documentation] #4055: Add ReadTheDocs config #3074

Job	Run time
Pull requests from forks should use other workflow	3s
pr_comment_reaction_rocket	0s
Check if github workflows were properly made from sources	12s
generate_matrixes	4s
prepare-macos-env	4s
prepare-windows-env	4s
Docker-iroha-builder	4m 26s
build-W	0s
build-UR (ubuntu gcc-10 Release normal)	49m 35s
build-UD (ubuntu gcc-10 Debug normal)	56m 47s
build-M (macos clang Debug normal)	1h 33m 44s
docker-R	0s
docker-D	0s
	3h 24m 59s

Provide feedback