Added FromGenerator support

[mixisLv]

Requirements

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Mark the following tasks as done:

• Checked the codebase to ensure that your feature doesn't already exist.
• Checked the pull requests to ensure that another person hasn't already submitted the feature or fix.
• Adjusted the Documentation.
• Added tests to ensure against regression.

Description of the Change

Added FromGenerator support (https://www.php.net/manual/en/language.generators.syntax.php#control-structures.yield)

Why Should This Be Added?

Useful to export large collections data structure and save memory.

Benefits

Useful to export large collections data structure and save memory.

Possible Drawbacks

Verification Process

Applicable Issues

[patrickbrouwers]

Hey, thanks for submitting this PR. This functionality was on my TODO-list, so happy someone added it!

Can you also add a test for the FromGenerator functionality and PR the docs with this new addition. Thanks.

[patrickbrouwers]

Will merge it after documentation is updated. Thanks!

[mixisLv]

Docs: SpartnerNL/laravel-excel-docs#86