Improve tile rendering

[github-actions[bot]]

Currently we do a small hack here, scaling up the tiles a little bit, to prevent visible gaps between tiles. This solution isn't perfect and we probably need to create a proper tile renderer. That can render multiple tiles on one quad instead of using a separate quad for each tile.

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https://github.com/fishfolk/bones/blob/0117f96a573c3c1387f5cd8977f5a6a26b10cb06/framework_crates/bones_bevy_renderer/src/lib.rs#L731-L738

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This issue was generated by todo-issue based on a TODO comment in 0117f96a573c3c1387f5cd8977f5a6a26b10cb06.