[DOCS] Revise "Try GX" for GX 1.0

[Rachel-Reverie]

Description

• Adds an example script that allows people to try various Expectations using provided data.
• Adds corresponding documentation that lets the user install and run GX.

Definition of done

• PR title is prefixed with one of: [BUGFIX], [FEATURE], [DOCS], [MAINTENANCE], [CONTRIB]
• Code is linted - run invoke lint (uses ruff format + ruff check)
• Appropriate tests and docs have been updated

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.33%. Comparing base (aad13e6) to head (0217086).
Report is 19 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #9897      +/-   ##
===========================================
- Coverage    77.94%   77.33%   -0.61%     
===========================================
  Files          494      490       -4     
  Lines        42440    41659     -781     
===========================================
- Hits         33080    32218     -862     
- Misses        9360     9441      +81     

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3.8 mysql	48.82% <ø> (-0.21%)	⬇️
3.8 postgresql	52.70% <ø> (-0.17%)	⬇️
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3.8 trino	50.75% <ø> (-0.20%)	⬇️
3.9	63.59% <ø> (-0.76%)	⬇️
3.9 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	?
3.9 aws_deps	?
3.9 big	?
3.9 databricks	?
3.9 filesystem	?
3.9 mssql	?
3.9 mysql	?
3.9 postgresql	?
3.9 spark	?
3.9 trino	?
cloud	0.00% <ø> (ø)
docs-basic	47.43% <ø> (-1.60%)	⬇️
docs-creds-needed	48.50% <ø> (-1.97%)	⬇️
docs-spark	47.16% <ø> (-1.39%)	⬇️

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[billdirks]

The general structure looks good. I left 2 comments inline.

[kwcanuck]

Feel free to implement or ignore the recommendations. If you have questions, let me know.