Display class ancestors in the sidebar #1183 #1021

Job	Run time
lint	18s
ruby-versions / Generate Ruby versions	4s
test (3.0, ubuntu-latest)	33s
test (3.0, macos-latest)	31s
test (3.0, windows-latest)	2m 29s
test (3.1, ubuntu-latest)	27s
test (3.1, macos-latest)	36s
test (3.1, windows-latest)	2m 2s
test (3.2, ubuntu-latest)	28s
test (3.2, macos-latest)	31s
test (3.2, windows-latest)	2m 32s
test (3.3, ubuntu-latest)	27s
test (3.3, macos-latest)	52s
test (3.3, windows-latest)	1m 57s
test (head, ubuntu-latest)	41s
test (head, macos-latest)	31s
test (head, windows-latest)	1m 59s
test (jruby, ubuntu-latest)	2m 14s
test (jruby, macos-latest)	1m 47s
test (jruby-head, ubuntu-latest)	2m 7s
test (jruby-head, macos-latest)	2m 45s
test (truffleruby, ubuntu-latest)	2m 27s
test (truffleruby, macos-latest)	2m 54s
test (truffleruby-head, ubuntu-latest)	3m 29s
test (truffleruby-head, macos-latest)	3m 26s
	38m 7s

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