feat: lake: cache get --package & stabilize --rev - #14724
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This PR adds the
--packageoption forlake cache get, which fetches outputs for a specific package in the workspace (not just the root). This is particularly useful for downloading dependency outputs from a custom service. In addition, the undocumented--revsupport has been removed fromputand documented forput-staged.The use of
--revforputcan be a footgun because Lake uses the toolchain and platform information of the currently loaded package input. Forput-staged, however, where these elements must be provided, it makes perfect sense (and is already in use in downstream).The PR also removes an unused, undocumented second positional argument for
lake cache addto specify the package, changing this to the new--packageand documenting that.