Release 1.9

[mariodebono]

This pull request updates the documentation to improve clarity, add new guides, and enhance the visual experience by converting static image references to theme-aware images. The changes include migrating several Markdown files to MDX format, introducing a new guide for managing launcher updates, and updating content to reflect recent launcher features.

Documentation enhancements:

• Migrated multiple documentation files from .md to .mdx format, enabling the use of React components and improving maintainability. [1] [2] [3] [4] [5]
• Replaced static image references with the ThemedImage component throughout the docs, allowing screenshots to adapt to light and dark themes for a better user experience. [1] [2] [3] [4] [5] [6] [7] [8]

New and updated guides:

• Added a new guide, manage-launcher-updates.mdx, detailing the full update process in Godot Launcher 1.9.0, including manual checks, skipping versions, retrying after errors, and handling prerelease updates.
• Updated the "Create Project" documentation to explain the new "Overwrite Project Path" feature, safety checks, and improved instructions for adding existing projects.
• Enhanced the "Launcher Settings" documentation to clarify new behaviors for update checks, project location overrides, and update management, reflecting launcher version 1.9.0 improvements. [1] [2]

Content restructuring:

• Removed the old create-project.md file and replaced it with a more detailed and feature-rich create-project.mdx. [1] [2]
• Updated references and links across guides to ensure consistency and direct users to the latest documentation sections. [1] [2]

(Top references: [1] [2] [3] [4] [5]