0.9.0 - egui 0.28 and tab close buttons

Changelog

• Update to egui 0.28.0 #67
• Update to Rust 1.76 #60 #66
• Optional close-buttons on tabs #70 (thanks @voidburn!)
• Add Tiles::rect to read where a tile is #61
• Add Behavior::paint_on_top_of_tile #62
• Fix: make sure Tree::ui allocates the space it uses in parent Ui #71 (thanks @rydb!)
• Fix bugs when having multiple Trees visible at the same time #68 (thanks @GuillaumeSchmid!)
• Fix drag-and-drop of tiles on touchscreen devices #74 (thanks @mcoroz!)
• Fix container resize drag for touchscreens #75 (thanks @mcoroz!)
• Update release instructions 62ecb4c
• Add clippy lint match_bool fadf41a
• Add a PR template 87110a9
• Expose egui_tiles::TabState 6e88ea9
• Pass &TabState to all relevant functions in Behavior ee1286a