Feat: Add Roadmap

[mariodebono]

This pull request includes updates to the Godot Launcher documentation and its supporting configuration files. Key changes include enhancements to the documentation structure and content, the addition of a roadmap link, and dependency updates for better compatibility and functionality.

Documentation Improvements:

• Updated docs/overview.md to improve clarity, fix minor grammatical issues, and add new sections for "Roadmap" and "Source Repositories." These changes improve readability and provide more actionable information for users.

Navigation Enhancements:

• Added a "Roadmap" link to the navigation menu in sidebars.ts and docusaurus.config.ts, pointing to the GitHub project roadmap for better visibility of ongoing and planned development. [1] [2]

Dependency and Version Updates:

• Bumped the version in package.json from 1.2.2 to 1.3.0 to reflect the new updates.
• Updated dependencies and devDependencies in package.json to newer versions, including React, Docusaurus, and TypeScript, ensuring compatibility and access to the latest features.