feat: caching bodies to avoid unnecessary object creation

[RobPasMue]

Description

Allow for body caching if no new bodies have been added. This reduces the amount of time we spend on object creation...

Issue linked

None

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[RobPasMue]

Needs investigation from my side... let's see what's going on.

[RobPasMue]

Okay so, on body deletion we also need to clear the cache. That was missing - my bad. Ready to go now!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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Additional details and impacted files

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