Refactor README.md for better visibility + readablilty for new users

[gokulprathin8]

What is this PR about?

Since we do not have a full fledged website for geoweaver docs. We have to utilize README.md to full extend to convey and convice users to try out / use geoweaver for their research / project.

There is a detailed outline describing what needs to go into the new README.md
https://docs.google.com/document/d/1ATng4rOhrOTIGIEGprWgKy7MAbm0yz_AGkmtCDhPEZ8/edit?usp=sharing

Important Links:
Website to write a README with all important side headings included - https://readme.so/
README badges and icons - https://github.com/Ileriayo/markdown-badges

What needs to be done?

• Changes to include all badges, we need new badges: binder, planetary computer, Downloads
• Circle CI needs to be repalce with Github Actions
• Geoweaver should include a link pointing to Pygeoweaver encoraging people with python background to check that repo
• Geoweaver README.md should highlight the new website - https://geoweaver.dev/
• Readme should have a bigger logo at the start of the readme similar to popular library readme files like xarray or matplotlib
• We have to use as many GIFs as possible to make the README look interactive
• Include citations and links previous papers based on geoweaver
• Clearly state why geoweaver exists - usecases, examples and demos
• Clear installation instructions for each platform: Widnows, Linux and MacOS. Pleas refer to https://geoweaver.dev/blog/installation/ for more details
• At the very end we should show all the contributors names, this should be dynamic. There are many projects that do this and we can re-use their README or understand how to make it dynamic.