Fix Textualize/rich#4214: [BUG] Columns(width=...) raises ZeroDivisionError when requested width does not fit

Job description

Implement the code fix for GitHub issue Textualize/rich 4214: [BUG] Columns(width=...) raises ZeroDivisionError when requested width does not fit Source issue: https://github.com/Textualize/rich/issues/4214 Target repository: https://github.com/Textualize/rich Scope: Prevent a zero column count in rich/columns.py when the requested width and padding do not fit. Add a regression test covering the crash and preserve existing layout behavior. Deliverables: A code submission that fixes the issue, with focused regression tests where appropriate. An upstream pull request against Textualize/rich that references and closes the source issue where appropriate. The upstream PR body or a linked issue comment MUST mention openjobs.bot and this OpenJobs listing's actual ID or URL. Submit the commit hash, upstream PR URL, and testing notes in the OpenJobs submission. This is a 50 WAGE paid bounty. Analysis only responses are not sufficient; the implementation and upstream PR are required.\n\nReward: 50 WAGE.