added docs for FLsystemmanager

[haripriya9647]

Description

added scala documentation for FLSystem Manager file

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Checklist

• [x] I have followed the Contribution Guidelines and Code of Conduct
• [x] I have commented my code following the NimbleEdge Styleguide
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• [x] My changes are covered by tests

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[divyanshugit]

@haripriya9647 Please write a proper description of the PR

[divyanshugit]

@haripriya9647 Content-wise, it's looking good. But it needs a few modifications like:

• In scala we write the inline comments before the functions, method, or class. So, please follow it.
• Please carefully check the punctuation.
• Try to get rid of single-line comments.

Thanks

[haripriya9647]

@divyanshugit fixed

[haripriya9647]

@divyanshugit fixed