Enable limiting the number of results for list operations

Right now we return every relevant result for `list` commands, which can be quite unwieldy in cases like `fh list releases NixOS/nixpkgs`. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Added optional result limiting to list and search commands for flakes, labels, organizations, releases, and versions queries. * **Chores** * Version updated to 0.1.26. <!-- end of auto-generated comment: release notes by coderabbit.ai -->