Space.jsx : Add Altitude & Velocity via Alternative API in Space.jsx

Integrate altitude and velocity data for the International Space Station (ISS) using a free and reliable alternative API.
Currently, the dashboard in Space.jsx displays basic ISS information. This enhancement aims to enrich the data visualization by adding live altitude and velocity readings.

Requirements:

Research and select a free API providing ISS altitude and velocity (e.g., Open Notify, Where The ISS At? API).
Fetch and display the ISS altitude (in kilometers) and velocity (in km/h or mph).
Ensure data updates dynamically along with existing ISS location info.
Format and label the values clearly for better readability.

Acceptance Criteria:

✅ Altitude and velocity data successfully retrieved from an alternative API.
✅ Data displayed alongside other ISS information on the dashboard.
✅ Values auto-refresh in sync with the current ISS position updates.
✅ Graceful handling of API errors (fallback or “data unavailable” message).

Bonus (Optional):

Add small visual indicators (📈 icons or motion animation) for velocity changes.
Allow user to toggle between metric (km/h) and imperial (mph) units.

Space.jsx から始め、dashboard が現在どのように ISS の位置データを取得・更新しているかを追跡します。提案されている無料 API を比較し、読みやすい単位とデータが利用できない場合の状態を備えた形で、高度と速度を既存の表示フローに統合します。位置情報とともに両方の値が更新され、API の失敗が適切に処理されれば完了です。

索引モデルが issue の本文から書いたものです。