Store Documentation update

[rkingsbury]

Summary

Overhaul some aspects of the Store documentation

• Add new tutorial page on query syntax, with examples
• Expand Using Stores page with more examples
• Add links from the list of Store to the corresponding API docs
• add AzureBlobStore to the API docs
• rename getting started to User Guide
• add a quickstart page at the top level
• Add new README content from Add content to README; documentation fixups #969 to the docs homepage

[rkingsbury]

Closes #702

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.76%. Comparing base (5ce1701) to head (d099a1c).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #976   +/-   ##
=======================================
  Coverage   88.76%   88.76%           
=======================================
  Files          46       46           
  Lines        3979     3979           
=======================================
  Hits         3532     3532           
  Misses        447      447           

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