Add query editor documentation

[kmcginnes]

Description

• Update references to name of the app to be "Graph Explorer" (not "the graph explorer")
• Add information about sidebar panels, including new query editor
• Add information about IAM permissions for read only access
• Add link to IAM permissions to root level readme

Validation

Related Issues

• Resolves Add documentation for Gremlin query editor #846

Check List

• I confirm that my contribution is made under the terms of the Apache 2.0
  license.
• I have run pnpm checks to ensure code compiles and meets standards.
• I have run pnpm test to check if all tests are passing.
• I have covered new added functionality with unit tests if necessary.
• I have added an entry in the Changelog.md.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 33.24%. Comparing base (a899239) to head (91e2e0e).
Report is 20 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #958      +/-   ##
==========================================
+ Coverage   30.72%   33.24%   +2.52%     
==========================================
  Files         525      523       -2     
  Lines       23627    21287    -2340     
  Branches     1408     1507      +99     
==========================================
- Hits         7259     7077     -182     
+ Misses      16241    14093    -2148     
+ Partials      127      117      -10     

Flag	Coverage Δ
unittests	33.24% <ø> (+2.52%)	⬆️

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[Cole-Greer]

Suggested change

	Graph Explorer project provides a React-based web application that enables users
	Graph Explore provides a React-based web application that enables users

[andreachild]

@Cole-Greer Graph Explorer