Merge branch 'jt/repo-structure-extrema'

"git repo structure" command learns to report maximum values on various aspects of objects it inspects. * jt/repo-structure-extrema: builtin/repo: find tree with most entries builtin/repo: find commit with most parents builtin/repo: add OID annotations to table output builtin/repo: collect largest inflated objects builtin/repo: add helper for printing keyvalue output builtin/repo: update stats for each object