config get: add support for displaying arrays and tables #6248

Job	Run time
build (no git)	1m 25s
check (protos)	1m 52s
nix flake (ubuntu-24.04)	7m 48s
nix flake (ubuntu-24.04-arm)	8m 12s
nix flake (macos-14)	13m 11s
test (linux-aarch64-gnu)	5m 57s
test (macos-aarch64)	7m 0s
test (macos-x86_64)	16m 47s
test (linux-x86_64-gnu)	6m 13s
test (windows-x86_64)	16m 17s
test (windows-aarch64)	15m 21s
check (rustfmt)	22s
check (doctests)	2m 58s
check (mkdocs)	14s
check (codespell)	14s
check (latest mkdocs, optional)	17s
check (zizmor)	22s
check (cargo-deny, licenses)	33s
check (clippy)	1m 30s
check (Cargo.lock dependency count)	4s
check (cargo-deny, bans)	24s
check (cargo-deny, advisories)	31s
check (cargo-deny, sources)	25s
required checks (merge queue)	0s
	1h 47m 57s

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