DOCSP-48810 - Move usage examples

[mongoKart]

Pull Request Info

PR Reviewing Guidelines

JIRA - https://jira.mongodb.org/browse/DOCSP-48810

Staging Links

fundamentals/crud/read-operations/retrieve

fundamentals/crud/write-operations/delete

fundamentals/crud/write-operations/insert

fundamentals/crud/write-operations/replace

fundamentals/crud/write-operations/update-many

fundamentals/crud/write-operations/update-one

Self-Review Checklist

• Is this free of any warnings or errors in the RST?
• Did you run a spell-check?
• Did you run a grammar-check?
• Are all the links working?
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[jordan-smith721]

LGTM