[DOCS] Revises and reorganizes content for installing additional dependencies per the GX 1.0 ToC

[Rachel-Reverie]

Description

• Adds "Install additional dependencies" topic per the revised 1.0 ToC
• Revises content provided for clarity.

Definition of done

• PR title is prefixed with one of: [BUGFIX], [FEATURE], [DOCS], [MAINTENANCE], [CONTRIB]
• 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 79.07%. Comparing base (4a6c924) to head (e829afe).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #9934   +/-   ##
========================================
  Coverage    79.07%   79.07%           
========================================
  Files          454      454           
  Lines        38475    38475           
========================================
  Hits         30425    30425           
  Misses        8050     8050           

Flag	Coverage Δ
3.10	65.30% <ø> (ø)
3.10 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	?
3.10 aws_deps	?
3.10 big	?
3.10 databricks	?
3.10 filesystem	?
3.10 mssql	?
3.10 mysql	?
3.10 postgresql	?
3.10 snowflake	?
3.10 spark	?
3.10 trino	?
3.11	65.30% <ø> (ø)
3.11 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	54.10% <ø> (ø)
3.11 aws_deps	45.25% <ø> (ø)
3.11 big	54.22% <ø> (ø)
3.11 databricks	46.37% <ø> (ø)
3.11 filesystem	60.05% <ø> (ø)
3.11 mssql	49.44% <ø> (ø)
3.11 mysql	49.51% <ø> (ø)
3.11 postgresql	53.74% <ø> (ø)
3.11 snowflake	47.06% <ø> (ø)
3.11 spark	57.05% <ø> (ø)
3.11 trino	51.60% <ø> (ø)
3.8	65.32% <ø> (ø)
3.8 athena or clickhouse or openpyxl or pyarrow or project or sqlite or aws_creds	54.11% <ø> (ø)
3.8 aws_deps	45.27% <ø> (ø)
3.8 big	54.24% <ø> (ø)
3.8 databricks	46.39% <ø> (ø)
3.8 filesystem	60.06% <ø> (ø)
3.8 mssql	49.42% <ø> (ø)
3.8 mysql	49.49% <ø> (ø)
3.8 postgresql	53.73% <ø> (ø)
3.8 snowflake	47.08% <ø> (+<0.01%)	⬆️
3.8 spark	57.02% <ø> (ø)
3.8 trino	51.59% <ø> (ø)
3.9	65.32% <ø> (ø)
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	48.22% <ø> (ø)
docs-creds-needed	49.38% <ø> (ø)
docs-spark	48.16% <ø> (ø)

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[kwcanuck]

A quick review. Feel free to implement or ignore the edits.