build

workspace: update changelog and docs for colocated workspaces #14920

Job	Run time
Build jj-lib without Git support	44s
Check protos	1m 7s
cargo-deny (advisories)	24s
build (ubuntu-latest)	4m 43s
cargo-deny (bans licenses sources)	21s
Clippy check	2m 31s
build (macos-13)	6m 15s
Check that MkDocs can build the docs	20s
build (macos-14)	3m 28s
Check that MkDocs can build the docs with Poetry 1.8	21s
build (windows-latest)	8m 49s
Check formatting	16s
build (ubuntu-latest, --all-features)	5m 38s
	34m 57s

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