Auto-resize trouble window to fit item count

[ompugao]

Summary

• After each item fetch, resize the Trouble window height to #items + #unique_groups so the window shrinks to fit when fewer items are present
• Caps at 35% of editor height (existing size = 0.35 max)
• Minimum height of 1 line
• Applies dynamically on every refresh (BufWritePost, InsertLeave, BufEnter) in both patto_tasks and patto_tasks_review sources