[Done] Customize default pixel_selection for mosaic endpoints

[samn]

The pixel_selection method is defined as a Query param, e.g.

titiler/src/titiler/mosaic/titiler/mosaic/factory.py

Lines 230 to 232 in cce68aa

	pixel_selection: PixelSelectionMethod = Query(
	PixelSelectionMethod.first, description="Pixel selection method."
	),

not as a dependency that can be overridden like other parameters. It would be nice to be able to customize the default mosaic method.

I'm happy to put together a PR adding a new dependency for the mosaic parameters if it sounds ok to you!

[vincentsarago]

I'm happy to put together a PR adding a new dependency for the mosaic parameters if it sounds ok to you!

🙏, sure that would be lovely!