Make tile service GoogleMaps-Compatible when the cog file is GoogleMapsCompatible

[sharkAndshark]

GDAL provides an interesting option when creating COG, TILING_SCHEME=[CUSTOM​/​GoogleMapsCompatible​/​...]

The goal of this PR is to allow frontend could use the googlemaps-compatible cog without extra steps(like make a custom tile grid), as google tilling schema seems is the most widely used schema, almost every JS lib support it( even only support it.)

LIke if we hanve a tiff file which is from zoom 0 - zoom 5 and it's googlemaps-compatible.

So there is a mapping from tiff-internal-xyz to google-map-xyz, I'm wondering if we could take this mapping and pretending that it's a tile source which use google tilling schema.

A sample like below:

tiff ifd number	zoom level	zoom level in google maps
0	5	14
1	4	13
2	3	12
3	2	11
....	....	....

Update the tilejson

To implement this, we could update the tilejson

{
    ...,
    // tell user the zoom level is  from 9-14 instead of 0-5 
   "min_zoom": 9, 
   "max_zoom": 14,
    ...
}

Convert the user requested zxy internally

To implement this, we could transform the resquested xyz to the actuall xyz of tiff tile

user requested	the actual zxy internally
/14/0/0	/5/4/3
....	....

[sharkAndshark]

Still a concept proofing draft.

[sharkAndshark]

More tests should be added and a lot of cleanup is needed.