Summary

Introduce a typed get_value helper on ComponentConfig that converts RON values into cu29_value::Value and deserializes into user-defined structs, with clearer error context and tests covering structured configs.

Related Issue: #720

Change

• Add ComponentConfig::get_value<T> to deserialize nested config entries into typed structs using cu29_value.
• Add ron_value_to_cu_value converter (including map/seq/option handling and no_std BTreeMap support).
• Add ConfigError::with_key to include the failing config key in error messages.
• Add tests for structured configs, mixed scalar/struct usage, and key-labeled errors.

Impact (how can be used for RON configuration)

You can now encode richer, nested RON configuration and deserialize it directly into typed
Rust structs instead of manually parsing scalars.

Example RON (task config):

config: {
  "settings": {
    "gain": 1.5,
    "matrix": [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0], [0.0, 0.0, 1.0]],
    "inner": { "threshold": 42, "flags": Some(true) },
    "tags": ["alpha", "beta"],
  },
}

Example usage:

#[derive(serde::Deserialize)]
struct SettingsConfig { /* ... */ }

let settings: SettingsConfig = component.get_value("settings")?.unwrap();

This enables strongly typed, nested configs in RON while keeping the existing scalar get::<T> path unchanged.