Add command to show LSP's internal state for diagnosing issues #13076

Job	Run time
build_node (ubuntu-latest)	1m 53s
build_node (macos-latest)	2m 17s
build_node (windows-latest)	5m 34s
Ruby 3.1 on ubuntu-latest	13m 29s
Ruby 3.2 on ubuntu-latest	12m 23s
Ruby 3.3 on ubuntu-latest	11m 11s
lint_node	43s
Ruby 3.4 on ubuntu-latest	10m 39s
Ruby 3.1 on macos-latest	10m 42s
lint_ruby	28s
Ruby 3.2 on macos-latest	9m 19s
Ruby 3.3 on macos-latest	6m 20s
Ruby 3.4 on macos-latest	6m 37s
spelling	21s
Ruby 3.1 on windows-latest	23m 27s
Ruby 3.2 on windows-latest	24m 52s
Verify Jekyll website builds	7s
Ruby 3.3 on windows-latest	25m 25s
Ruby 3.4 on windows-latest	25m 13s
	3h 11m 0s

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