Migrate static landing page to React app with routing and centralized data

[phoneuooyd]

Motivation

• Replace a large static HTML landing page with a componentized React application to enable client-side routing, reuse and easier maintenance.
• Centralize site content and translations into a data module so UI components can render language-aware text and project details.
• Provide dedicated project detail pages and a language switcher to improve navigation and i18n readiness.

Description

• Replace index.html content with a mounting point (<div id="root"></div>) and load the React entry src/main.jsx instead of embedding the whole page and inline scripts.
• Introduce React routing and state: add react-router-dom to package.json and update package-lock.json, and implement routes in src/App.jsx for / and /projects/:slug with a HomePage wrapper and language state.
• Add componentized UI: refactor and simplify components Header, About, Projects, Skills, and Contact, and add a new ProjectPage component (all under src/components/) to render project details and galleries.
• Create src/data/portfolioData.js to centralize profile, multilingual homeContent, skillGroups and projects data, and update src/main.jsx and src/index.css imports accordingly.

Testing

• No automated tests were added or executed as part of this change.

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Codex Task