Backtest self-categorization

[jhonabreul]

Expected Behavior

We document backtest self-categorization with the new naming and tagging functionalities implemented in https://github.com/QuantConnect/Lean/pull/7683.

Naming:

• We provide the QCAlgorithm.Name property which can be set either directly by its setter or with the SetName method. Name is limited to 200 characters, so if the value has more characters, it gets truncated.

Tagging:

• Algorithms can now have tags which will be available in the QCAlgorithm.Tags property.
• The Tags collection can be directly set with the property setter or using the SetTags method, which will override any exisiting tags.
• A single tag can be added using the AddTag method.
• The collection can hold up to 20 tags.
• As for the name, tags can only have at most 200 characters, or else they will be truncated. Even with the property setter or the SetTags method, they will be checked and truncated if necessary.

Actual Behavior

New feature, not documented.

Checklist

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