✨ feat(#49): Credit

[naoki-00-ito]

This pull request introduces a new reusable Credit component to display copyright and attribution information, and refactors existing copyright displays in the app to use this component. Additionally, it adds a new data source to the data list. These changes improve maintainability and consistency in how credits are shown throughout the mobile app.

Component and UI Refactoring

• Added a new Credit component (mobile-app/components/credit/index.tsx) that centralizes and standardizes the display of copyright and attribution information, including OpenStreetMap and bus stop data credits. [1] [2] [3]
• Replaced the previous inline copyright display in the map screen (mobile-app/app/(tabs)/index.native.tsx) with the new Credit component for improved consistency and maintainability. [1] [2]
• Added the Credit component to the About screen (mobile-app/app/(tabs)/about.tsx) to ensure attribution information is visible in multiple relevant locations. [1] [2]

Data Source Update

• Added a new entry for bus stop information from the Tokyo Metropolitan Bureau of Transportation and Public Transport Open Data Council to the DATA_LIST constants, increasing data transparency.