tl/ls-tree-oid-only (was: What's cooking in git.git (Feb 2022, #01; Thu, 3))

> * tl/ls-tree-oid-only (2022-01-13) 9 commits
>  - ls-tree.c: introduce "--format" option
>  - cocci: allow padding with `strbuf_addf()`
>  - ls-tree.c: introduce struct "show_tree_data"
>  - ls-tree.c: support --object-only option for "git-ls-tree"
>  - ls-tree: optimize naming and handling of "return" in show_tree()
>  - ls-tree: use "size_t", not "int" for "struct strbuf"'s "len"
>  - ls-tree: use "enum object_type", not {blob,tree,commit}_type
>  - ls-tree: add missing braces to "else" arms
>  - ls-tree: remove commented-out code
>
>  "git ls-tree" learns "--oid-only" option, similar to "--name-only",
>  and more generalized "--format" option.
>
>  Will merge to 'next'?
>  source: <cover.1641978175.git.dyroneteng@gmail.com>