Add rgee cheat sheet

[ambarja]

Contributed Cheat Sheet Information

Cheat Sheet Name: Google Earth Engine with R 1 sentence description of the contents: Cheatsheet about the use of Google Earth Engine inside R Your Name (as you want to be credited on the website): Antony Barja and Cesar Aybar A link to relevant package documentation (optional): https://r-spatial.github.io/rgee/ Date created/updated (Month YYYY format): February - 2022

Please be sure you've included the Creative Commons License:

• [x] Add CC-BY-SA Your Name to copywrite under the Creative Commons on the cheat sheet

Check that you have done the following:

• [x] Used descriptive file names, something like package-name.pdf or task-name.pdf and did not include "cheat sheet" in the title.
• [x] Included a PDF file of entire cheat sheet.
• [x] Included a PNG file of the first page size 1100 x 850 in the pngs folder (for the website thumbnail).
• [x] Included a Keynote or PowerPoint or similar file in the relevant folder (helps translators who want to translate your cheat sheet).

[mine-cetinkaya-rundel]

@ambarja Thank you for this submission. Can you also add a thumbnail (png) to the pull request as well?

[ambarja]

@mine-cetinkaya-rundel I would like to know if the formats are correct, thank you.

[mine-cetinkaya-rundel]

@ambarja It looks like it. I'll merge a batch of PRs in September and will review this more carefully then as well.

[ambarja]

@ambarja It looks like it. I'll merge a batch of PRs in September and will review this more carefully then as well

Thank you very much @mine-cetinkaya-rundel, I will look forward to your comments. 👀

[mine-cetinkaya-rundel]

Added in be5dd62