Gridded Forcings Engine Data Provider

[program--]

This PR depends on #720 and closes #705.

Adds a ForcingsEngineGriddedDataProvider class inheriting from ForcingsEngineDataProvider<Cell, GridDataSelector>.

Additions

• Adds ForcingsEngineGriddedDataProvider class.

Removals

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Changes

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Testing

1.

Screenshots

Notes

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Todos

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Checklist

• [ ] PR has an informative and human-readable title
• [ ] Changes are limited to a single goal (no scope creep)
• [ ] Code can be automatically merged (no conflicts)
• [ ] Code follows project standards (link if applicable)
• [ ] Passes all existing automated tests
• [ ] Any change in functionality is tested
• [ ] New functions are documented (with a description, list of inputs, and expected output)
• [ ] Placeholder code is flagged / future todos are captured in comments
• [ ] Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)
• [ ] Reviewers requested with the Reviewers tool :arrow_right:

Testing checklist (automated report can be put here)

1.

Target Environment support

• [ ] Linux