feat(highcharts): implement map-route-path (#7607)

## Implementation: `map-route-path` - python/highcharts

Implements the **python/highcharts** version of `map-route-path`.

**File:** `plots/map-route-path/implementations/python/highcharts.py`

**Parent Issue:** #3768

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:robot: *[impl-generate
workflow](https://github.com/MarkusNeusinger/anyplot/actions/runs/26207744905)*

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Markus Neusinger <2921697+MarkusNeusinger@users.noreply.github.com>

Author: 3 people