Merge branch 'ps/refs-wo-the-repository' into jch

The ref subsystem and the worktree API have been refactored to pass a repository pointer down the call chain, allowing them to drop references to the global 'the_repository' variable. As part of this, the handling of the 'core.packedRefsTimeout' configuration has been moved into the per-repository ref store structure. * ps/refs-wo-the-repository: refs: remove remaining uses of `the_repository` worktree: pass repository to public functions worktree: pass repository to file-local functions worktree: refactor code to use available repositories refs/files: drop `USE_THE_REPOSITORY_VARIABLE` refs/packed: de-globalize handling of "core.packedRefsTimeout"