Create GETTING_STARTED.md

[mikeshwe]

just a link to docs.astrnomer.io tutorial on SDK

Description

What is the current behavior?

What is the new behavior?

Does this introduce a breaking change?

Checklist

• [ ] Created tests which fail without the change (if possible)
• [ ] Extended the README / documentation, if necessary

[codecov[bot]]

Codecov Report

Base: 94.25% // Head: 94.25% // No change to project coverage :thumbsup:

Coverage data is based on head (178f4d7) compared to base (e63a3ce). Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1036   +/-   ##
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  Coverage   94.25%   94.25%           
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  Files          64       64           
  Lines        2839     2839           
  Branches      312      312           
=======================================
  Hits         2676     2676           
  Misses        112      112           
  Partials       51       51           

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[kaxil]

We already have the same link in the README. You have added it in #1000 🤔 Do we really need both?

Mainly because https://astro-sdk-python.readthedocs.io/en/latest/ has nothing at all in Getting started? Or should we show our README.md in that section?

[feluelle]

Makes sense, thanks @kaxil.