Capture features in docs

[christianheussy]

Current Limitation

The documentation does not clearly indicate which parts of the logic are gated behind feature flags (e.g., serde). This makes it difficult for users to understand which features are available under specific configurations.

Proposed Solution

Clearly indicate feature-gated logic within the documentation. This can be achieved by annotating documentation comments appropriately, ensuring these annotations are included during docs.rs generation. This enhancement would improve clarity and usability by explicitly specifying feature dependencies.