Add quadkey conversion to xy coordinates in the Bingtiles grid generator

[tm-abby-moreno]

This PR is based on the replies in discussion #90

Added a boolean parameter add_xy_cols in the class BingTileGridGenerator whether user would want to convert quadkey to xy coordinates. The newly created function quad_to_xy is based on this stackexchange.

I tested this on zoom_level = 12 and speed is still the same! I then tested it on zoom_level = 16 because this was the use case for CI and the baseline (without quadkey conversion) is ~32 mins. and when there is quadkey conversion to xy it still runs for 30 mins. TLDR: the things that I added did not impact the runtime 😄 I also added to the tutorial and fixed some typos in other comments.

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[tm-abby-moreno]

Updated the code to call xyz directly and added a test @jtmiclat @butchtm :)

I took some time as I was testing it out. For zoom_level = 15 it runs for only ~13 mins. but when I tried it the first time for zoom_level = 16 it ran for ~50 mins. But I tried running again just this morning and it ran for ~32 mins. Just wanted to flag this! Not exactly sure what the problem is. Note: I always test it on 16 because this is the use-case for Josh in CI.

re: failing pre-commit test how do I fix this?

[jtmiclat]

@tm-abby-moreno. You can ignore the pre-commit test failing. I took a look and the issue isnt with the code you changed but a dependency issue in the pre-commit.

Addressed that issue in a separate PR: https://github.com/thinkingmachines/geowrangler/pull/208