Styling transform output should respect json vs yaml format configuration

[nathanacurtis]

Problem

When running a styling transform, the output format is fixed regardless of how the user has configured their preferred format (json or yaml). The format configuration is ignored, so users always get the same format even when they've set a different preference.

Solution

The styling transform should read the format configuration and produce output in the configured format — json or yaml — matching what the user gets from other transforms.

Acceptance criteria

• Styling transform output is json when the format is configured as json
• Styling transform output is yaml when the format is configured as yaml
• Styling transform output format is consistent with other transform outputs under the same configuration

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Implementation details are tracked internally.