stdlib: add auto formatting to the shell #13595

Job	Run time
Build Erlang/OTP (64-bit)	16m 11s
Event File	2s
Build Erlang/OTP (iOS)	6m 39s
Build Erlang/OTP (32-bit)	9m 6s
Build Erlang/OTP (macOS)	7m 57s
Build Erlang/OTP (Types and Flavors)	0s
Build Erlang/OTP (cross-compile)	13m 38s
Build Erlang/OTP (clang)	6m 11s
Build Erlang/OTP (Windows)	13m 27s
Build and check documentation	8m 48s
Run static analysis	6m 40s
Test Erlang/OTP (kernel)	1h 1m 18s
Test Erlang/OTP (stdlib)	35m 35s
Release Erlang/OTP	0s
Test Erlang/OTP (system)	10m 24s
	3h 15m 56s

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